iGaming SEO glossary
An iGaming SEO glossary of 94 terms across AI search, technical SEO, links, commercial models, compliance and the gambling verticals themselves. Written to be quoted: each definition is self-contained, so it still makes sense pulled out on its own.
AI Gambling Marketing is an independent How the programme fits together agency, and this glossary is published free because definitional content is exactly what language models cite when someone asks what a term means.
What does GEO mean in SEO?
An iGaming SEO glossary of fifty-one terms across AI search, technical SEO, links, commercial models and regulation. Every definition is self-contained and between twenty-five and forty-five words, so it can be quoted without surrounding context.
Definitions matter here more than in most industries. Around 68% of AI citations point at third-party sources, and definitional content is cited disproportionately because a model reaching for a plain explanation will take whichever one it can parse. There are 57 terms below, grouped into 6 sections, and none of them sit behind a login.
57terms defined
6sections
0logins required
Freeto copy
How to use this iGaming SEO glossary
Where these definitions stop being useful
They describe how terms are used in iGaming SEO in 2026, never what a standards body says. Several of them — retrieval rate, share of answers, AI Mode — have no agreed industry definition at all, which means another vendor may use the same word to mean something measurably different. Where that is likely, the definition says so and not implying consensus that does not exist.
Sources for the figures inside these definitions: RedClaw · ICODA. Each definition that rests on a figure links to where that figure came from.
Related on this site
- /What we do — Nine iGaming SEO services for casino, sportsbook and affiliate brands. Technical, content,.
- /AI visibility measurement methodology — The complete AI visibility measurement methodology: prompt construction, sampling, counting.
- /Analysis — Analysis on iGaming SEO and AI search. Every figure carries a source and a date. No listicles,.
- /Who we work with — for operators, affiliates, B2B suppliers, crypto casinos and land-based venues. Six.
- /Gambling markets we cover — by market across 40 jurisdictions. Regulator, licence framework, tax, advertising.
- /What each tier includes — pricing $900 a month against a market range of $1,500 to $2,500. Four tiers,.
- /See where you stand — A free AI visibility audit for iGaming brands. One market, 6 AI surfaces, 3 competitors you.
AI search
The vocabulary that changed fastest, and where the same word frequently means three things depending on who is selling it to you.
- Generative Engine Optimisation GEO
- Work aimed at getting a brand named inside answers produced by generative AI systems, including ones with no connection to Google's index. It focuses on entity strength, fact consistency across sources, and content a model can safely quote.
- Answer Engine Optimisation AEO
- Work aimed at getting content extracted as the direct answer — in featured snippets, People Also Ask, AI Overviews and voice results. The payoff is frequently the mention rather than the click, which changes how it is measured.
- AI Overview AIO
- Google's generated summary shown above conventional results. Pew Research found that when one is present, people click an organic result 8% of the time against 15% when it is absent, and click a cited source about 1% of the time.
- AI Mode
- Google's fully conversational search surface, distinct from AI Overviews in triggering and citation behaviour. It accounted for roughly 0.34% of Google searches over the first four months of 2026, and it sends visitors onward far less often than a classic results page does.
- Retrieval rate
- The share of model responses where the system actually performed a web search rather than answering from training data alone. It matters because a model that never searched cannot cite you, and it forms the honest denominator for any visibility figure.
- Citation rate
- The share of responses that cite any source at all. Reporting your share of only the responses that cited something inflates the number, because it silently discards every run where the model answered without looking anything up.
- Matthew effect
- The tendency of language models to favour sources that are already heavily cited, which compounds existing authority. In practice it means new brands climb slowly in AI visibility and established ones hold position with less effort than they expect.
- Grounding
- Connecting a model's answer to retrieved documents, not to its training data. Grounded answers carry citations and can be influenced by publishing; ungrounded ones reflect what the model already absorbed and are far harder to move.
- Hallucination
- A confident, fluent statement that is factually wrong. In gambling this most often appears as incorrect licensing, bonus terms or legality claims, which is why fact consistency across your own sources matters more here than in most verticals.
- Prompt set
- The fixed list of questions used to measure AI visibility, held constant between numbered revisions. An unfixed set can show improvement without the brand moving at all, which is why ours is published.
- Denominator
- The pool a visibility percentage is calculated against. Seventeen citations out of forty-two runs and seventeen out of a hundred both get reported as seventeen, and only one of those is good news.
- Refusal
- A run where the surface declines to answer a gambling question and returns a hedge instead. Refusals are reported separately rather than counted as zeros, because folding them in flatters every operator in the set.
- llms.txt
- A proposed file for telling language models how to use a site. No major model provider has confirmed reading it, so treat any agency selling it as a deliverable with the same scepticism as a ranking guarantee.
- Answer displacement
- When a summary answers the question so completely that the click never happens. In iGaming it is estimated to absorb between 30% and 50% of informational click-through.
- Non-retrieval
- A run where the model answered from training data without searching. Content published this year is invisible to those answers, which is a third-party presence problem rather than an on-page one.
- Chunking
- Splitting a page into passages for retrieval. A paragraph that refers to something above or below it stops making sense once retrieved alone, which is why self-contained writing matters more than it used to.
- Speakable
- A schema property marking passages suitable for reading aloud. Voice results are largely an output of the same extraction that drives snippets, so it is treated as part of answer engine work rather than a separate service.
Search and technical
Standard SEO vocabulary, defined where it behaves differently on a gambling site.
- Crawl budget
- The volume of pages a search engine will fetch from a site in a given period. It becomes a practical constraint on casino sites, which routinely exceed ten thousand URLs before faceted navigation multiplies the total further.
- Index coverage
- The gap between pages you have published and pages a search engine is actually holding. On large iGaming sites this gap is routinely wider than teams expect and concentrated in one or two page templates.
- Largest Contentful Paint LCP
- How long the biggest visible element takes to render. On iGaming sites a mobile LCP above roughly 3.5 seconds behaves less like a ranking penalty and more like silent index removal, with pages quietly dropping out of the index.
- Time to First Byte TTFB
- How long the server takes to start responding. Front-end optimisation on top of a slow origin achieves very little, which is why a target under 200ms comes before image and script work on most audits.
- hreflang
- An annotation telling search engines which language and region a page version serves. Around 75% of international sites carry errors in it, and a single broken annotation causes the entire cluster to be ignored instead of partially applied.
- Canonical tag
- A signal naming the preferred version of duplicate or near-duplicate pages. A common multilingual failure is pointing every language version at the English page, which explicitly tells Google to disregard all the others.
- Doorway page
- A near-duplicate page targeting one geography or keyword variation, produced at scale from a template. Named directly in Google's spam policy and the specific risk in mass city-page and location-page programmes.
- Scaled content abuse
- Publishing large volumes of pages with little original value, primarily to game search rankings. Introduced as a classification in March 2024 and enforced considerably harder by the March 2026 spam update, which completed in 19.5 hours.
- Content pruning
- Merging, improving or removing weak pages so the strongest ones are not held back. Frequently the highest-return action on an affiliate site and the one operators resist most, because the pages being removed once earned money.
- E-E-A-T
- Experience, Expertise, Authoritativeness and Trustworthiness — the framework quality raters apply. In one audit of fifty-plus iGaming sites, named-author expertise predicted which sites held rankings through core updates better than domain authority or backlinks.
- Index bloat
- Thousands of low-value URLs competing for the same crawl budget as the pages that matter. It caps the whole domain, which is why removals are usually the first technical fix on an iGaming site.
- Log file analysis
- Reading server logs to see what search engines actually fetched, rather than what a crawler simulation suggests they might. It is the only way to confirm where crawl budget is really going.
- Render budget
- The separate, smaller allowance for executing JavaScript on fetched pages. A site whose odds or game data only appears after rendering can be crawled and still indexed empty.
- Soft 404
- A page returning a success status while showing nothing useful, such as an expired promotion or a market that has closed. Search engines treat it as a quality signal against the whole domain.
- Pagination
- How a long catalogue is split across numbered pages. Done badly it either hides most of the inventory from crawlers or duplicates it, and both outcomes are common on game libraries.
- Interaction to Next Paint INP
- How quickly a page responds to a tap or click. It matters more on gambling sites than most, because the interactions being measured are filter taps on catalogues with thousands of items.
- SERP feature
- Anything on a results page that is not a standard organic listing: snippets, People Also Ask, AI Overviews, local packs. In iGaming they absorb the majority of clicks on informational queries.
- Hreflang cluster
- The set of pages declaring each other as language alternates. Miss one return link and the whole cluster is discarded, not just the broken pair, which is why the failure is all-or-nothing.
- x-default
- The hreflang value naming the fallback page for visitors whose language matches no alternate. It must point at one fixed page for the whole group; pointing it at whichever page is rendering makes the signal worthless.
Links and authority
Where gambling diverges most sharply from mainstream SEO, mostly because publishers refuse the category.
- PPLC
- Industry shorthand for the four hardest link-building verticals: porn, pills, loans and casinos. The common factor is refusal, never competition — most publishers will not link to any of them at any price.
- Private Blog Network PBN
- A network of sites controlled by one party, used to pass ranking signals. Widely sold into iGaming between 2018 and 2021, now a reliable trigger for manual action, and still openly advertised by some agencies.
- Parasite SEO
- Publishing on a high-authority third-party domain to borrow its ranking power, typically through sponsored news placements. Google's site reputation abuse policy is actively delisting exactly this pattern, which was the casino niche's most common shortcut.
- Niche edit
- A link inserted into an existing, already-indexed article, not a new post. Cheaper than a placement and worth doing only where the host page has genuine traffic and topical relevance to gambling.
- Digital PR
- Earning coverage and links by producing something worth citing, usually original data pitched to journalists. It is a different discipline from outreach and it is priced differently, which is why we do not sell it: our link work is outreach and guest posts only, with the publisher fee passed through at cost.
- Anchor text
- The visible words a link uses. A profile where every anchor matches the same commercial keyword looks manufactured, which invites precisely the scrutiny a gambling site is trying to avoid.
- Tiered link building
- Building lower-quality links to pages that link to your site, and not directly. Popular in gambling because quality links are scarce and expensive, and a common reason publishers refuse the category in the first place.
- Manual action
- A penalty applied by a human reviewer instead of an algorithm. iGaming sites with private blog networks, cloaking or thin affiliate content receive these more often than sites in almost any other category.
- Anchor concentration
- The share of inbound links using the same anchor text. Above roughly 8% exact-match, manual review indicators climb sharply in gambling profiles, which is why anchor plans are capped.
- Link velocity
- The rate at which new links appear. A consistent monthly cadence compounds; the same count acquired in one burst reads as a purchase and is treated as one.
- Parasite placement
- Renting a subfolder on somebody else's authoritative domain. Google's site reputation abuse policy targets it directly and it is on the published refusal list here.
- Link retention
- The share of placements still live twelve months later. It is the figure that separates a real editorial placement from a paid post that gets pruned at the next site clean-up.
- Traffic floor
- A minimum monthly visitor count a publisher must clear before we will place on it. In testing, a DR45 site with 80,000 visitors moved rankings more than a DR60+ site with under 2,000, so traffic is the signal and DR is the proxy.
- Rejection rate
- The share of outreach refused by publishers. In gambling it runs between 17% and 44% on open marketplaces and higher on the sites worth having, which is why placement counts are targets rather than guarantees.
iGaming commercial
The economics, because most SEO conversations in this industry end up here.
- First-time depositor FTD
- A referred player who completes a qualifying first deposit. The unit most iGaming acquisition is priced in — average cost per FTD sits around $170 across channels and $250 to $650 through paid media in mature markets.
- Cost per acquisition CPA
- A fixed payment per qualifying depositor. Tier-one regulated casino CPA runs $150 to $400 with a median near $250; sportsbook prices 20% to 30% below that in the same market because lifetime value is lower.
- Net Gaming Revenue NGR
- Gross gaming revenue less bonus costs, payment fees, jackpot contributions and applicable taxes. The exact deductions vary by contract, which is why two programmes advertising the same percentage can pay very differently.
- Gross Gaming Revenue GGR
- Total amount wagered less winnings paid out, before any deductions. Most gambling tax regimes are calculated on it — Brazil applies 12%, the UK 21% on remote gaming — though Germany taxes stakes instead.
- Negative carryover
- When referred players win more than they lose in a period, the resulting negative balance carries into the next month and must be recovered before the affiliate earns again. For high-variance cohorts it can erase several months.
- Hybrid deal
- A smaller upfront CPA combined with a reduced revenue share. Increasingly the default in competitive casino programmes because it balances immediate cash flow against long-term alignment on player quality.
- Lifetime value LTV
- Total net revenue a player generates before churning. It sets the ceiling on acquisition spend, which is why sportsbook CPA sits below casino and why organic matters more where margins are thinner.
- Retention
- Keeping an acquired player active. It sits outside SEO but decides whether acquisition was worth its cost, and an operator with weak retention will not see value from more traffic.
- Aggregator
- A platform supplying many game studios through one integration. Aggregators are B2B buyers with long cycles and small audiences, which changes the whole shape of the SEO work.
- VIP scheme
- A tiered rewards programme for high-value players, and in several markets now a regulatory pressure point rather than a marketing asset. Content describing one has to survive a compliance read.
- Wagering requirement
- How many times a bonus must be staked before winnings can be withdrawn. It is the single most searched bonus term and the one operators explain least clearly.
- Return to player RTP
- The theoretical percentage of stakes a game returns over a very large number of rounds. It is a long-run average, not a session expectation, and stating that distinction is what makes the page citable.
Regulatory and compliance
Terms that decide what a page is permitted to say, which is upstream of whether it ranks.
- UK Gambling Commission UKGC
- The regulator for Great Britain, operating under the Gambling Act 2005. Requires remote operating licences per activity, bans credit card gambling, mandates GAMSTOP integration and applies stake limits on online slots.
- Malta Gaming Authority MGA
- A widely held European licensing authority, frequently used as a base for multi-market operators. Carries more trust weight than Curaçao and less than a UKGC licence in markets where a local licence is available.
- Secretaria de Prêmios e Apostas SPA
- Brazil's federal gambling regulator, established under Law 14.790/2023 with licensing live since 2025. Applies a 12% tax on gross gaming revenue and issues authorisation per brand alongside state-level licensing.
- Gemeinsame Glücksspielbehörde der Länder GGL
- Germany's federal gambling authority, administering the 2021 state treaty. Enforces a €1 maximum stake per spin, a €1,000 monthly cross-operator deposit limit and a five-second minimum spin duration on virtual slots.
- AGCO and iGaming Ontario AGCO
- Ontario's regulator and its commercial operating body. Applies among the strictest advertising rules in North America — bonuses cannot be advertised to the general public and athlete endorsement is prohibited outright.
- PAGCOR
- The Philippine Amusement and Gaming Corporation, licensing domestic online gaming. Offshore operator licensing has been wound down since 2024, so guidance about this market written before then is frequently out of date.
- Know Your Customer KYC
- Identity verification required before a player can deposit or withdraw in regulated markets. Content explaining verification requirements is legitimate; content designed to help players circumvent them is not, and we decline it.
- Self-exclusion
- A scheme allowing players to block their own access across licensed operators — GAMSTOP in Great Britain, OASIS in Germany. Participation is mandatory in those markets and functions as a visible legitimacy signal to players.
- Responsible gambling
- Content and tooling that helps players understand risk and limit their own play. Required by regulators and rewarded by search engines in a YMYL vertical, which makes it one of the few places where both incentives point the same way.
- Anti-money laundering AML
- Controls on the source and movement of player funds. Content that implies these checks can be avoided is a refusal here regardless of market or budget.
- Affordability check
- A regulator-mandated assessment of whether a player can sustain their losses. Where they apply they change the funnel materially, and content that ignores them dates quickly.
- Your Money or Your Life YMYL
- Google's category for content that can affect health, finances or safety. Gambling sits inside it, which means the same trust bar as medical and financial content.
- Site reputation abuse
- Publishing third-party content on an authoritative domain to borrow its ranking. Google's policy targets it directly and gambling was among the first verticals enforced against.
Gambling verticals
The product categories that sit under the gambling umbrella, and why each behaves differently in search.
- iGaming
- The umbrella term for online gambling — casino, sportsbook, poker, bingo and lottery. Used across the industry to describe the vertical as a whole, never any single product category within it.
- Sportsbook
- An operator taking bets on sporting events. Roughly 35% of the global vertical, with demand arriving in fixture-driven peaks, not evenly, which makes indexation timing decisive.
- Online poker
- Player-versus-player card games where the operator takes rake, not holding a house edge. Regulated separately from casino in several markets, including under Germany's federal framework.
- Online bingo
- A number-draw game with a strong social component, heavily weighted toward the UK market. The demographic skews older than casino, which changes both the content register and the device mix.
- Online lottery
- State or licensed draw games and instant-win tickets. Sits on a separate regulatory footing from casino in most jurisdictions, so compliance content cannot be shared between the two.
- Virtual sports
- Computer-generated sporting events with continuously running results, independent of any real fixture calendar. Carries meaningful volume in markets such as Nigeria and is served by very little quality content.
- Esports betting
- Wagering on competitive video gaming. Fixture logic resembles conventional sportsbook, while the audience overlaps heavily with crypto casino players in both age profile and payment preference.
- Crash game
- A game where a multiplier rises until it stops at an unpredictable point, and the player must cash out first. Enormous search volume in Brazil and India, and enough regulatory attention that content needs care.
- Live dealer
- Casino games streamed with a human dealer in real time. Search intent here is unusually trust-led, because the question underneath is whether the stream is genuine.
- In-play betting
- Betting after an event has started, with odds updating continuously. It generates the majority of sportsbook turnover in most markets and almost none of the search volume.
- Cash out
- Settling a bet before the event finishes at the current offered price. One of the highest-intent comparison terms in sportsbook search, and answered badly by nearly everyone.
- Sweepstakes casino
- A dual-currency model legal in most US states where real-money online casino is not. The rules that make it possible are the rules that make it fragile, and the regulatory clock is running.
Crypto and newer verticals
Where two YMYL categories overlap and the vocabulary turns over fastest.
- Provably fair
- A cryptographic method — usually seed and hash verification — letting players confirm a game outcome was not manipulated. The defining trust signal for a crypto casino, and one most operators mention without ever explaining.
- On-chain settlement
- Recording bets or payouts on a public blockchain. It is verifiability, not anonymity, and content that blurs the two creates a liability for the operator long before anyone else.
- No-KYC
- An operator not requiring identity verification. It can be described factually where it is legal; framing it as a way around identity checks is a refusal here, at any budget.
- Stablecoin
- A crypto token pegged to a fiat currency, used to avoid price movement between deposit and withdrawal. In practice the most common crypto deposit method for gambling.
- /AI search — ten terms covering GEO, AEO, AI Overviews, retrieval and citation.
- /Search and technical — twelve terms from crawl budget to E-E-A-T.
- /Links and authority — eight terms including PPLC, PBN and parasite SEO.
- /iGaming commercial — eight terms covering FTD, CPA, RevShare, NGR and GGR.
- /Regulatory — nine terms naming UKGC, MGA, SPA, GGL, AGCO and PAGCOR.
- /Crypto and newer verticals — four terms including provably fair and crash games.
Why this is free and not gated
Because a definition behind an email form is not a definition, it is a lead magnet wearing one. And practically: glossary content is cited disproportionately by language models relative to how little of it exists, so gating it would remove the only reason to publish it.
It is also the argument we make on the content page — that models cite definitional content readily and almost no operator builds any. It would be odd to say that and then not do it ourselves.
If a term you need is missing, send it. The list grows from what people actually ask instead of from a keyword export.
Two of these terms carry more weight than the rest in practice. Retrieval rate and share of answers are what the AI Visibility Index reports separately, and the reason our figures come out lower than several dashboards is documented in the measurement method.
Where a definition here matters commercially, the service page covering it goes further: Technical SEO on indexation and Core Web Vitals, Multilingual and hreflang on hreflang, and casino link building services on the terms in the links section.
About this glossary
How often do you update these definitions?
Reviewed quarterly, and corrected immediately when something turns out to be wrong. Several terms here describe a field changing every few months, so a definition that was accurate in January can be quietly misleading by June if nobody is checking it against current behaviour.
Why are the definitions all a similar length?
Because each one is written to be quoted on its own. Twenty-five to forty-five words is roughly what an answer engine will lift intact, and a definition that needs the paragraph around it to make sense is not much use in that format.
Can I use these definitions elsewhere?
Yes, with attribution and a link back. That is the entire reason for publishing them openly and not gating them behind an email form, and a definition nobody is permitted to quote is not doing the job it was written to do in the first place.
A term I need is missing. Can you add it?
Send it over and we probably will. The list grows from what people actually ask and not from a keyword export, which is why a few obvious terms are absent and several fairly obscure ones are here and defined at length.
Free · No obligation
See which of these terms you are visible for.
The free audit runs a hundred prompts across 6 AI surfaces in your market, including the definitional questions models answer most readily.
Run my audit