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GEO vs SEO: what actually changes in the work

The verdict

GEO is SEO with a different scoring surface. Generative engines still retrieve from a search index, so crawling, content and links still decide whether you're eligible at all. What genuinely changes is format: self-contained answers, citable numbers, consistent entity data and comparison tables. Roughly 10–15% of a ₹75,000 retainer is worth reallocating.

Updated 26 July 2026 · Written by the Last Agency team · See what SEO actually costs

The short version

  • Retrieval runs on an index. If you're not indexed and ranking somewhere in the top results, you're not in the citation pool — so GEO cannot replace SEO, only sit on top of it.
  • Four deliverables genuinely change: answer-first formatting, original statistics, comparison tables, entity consistency. Everything else is the same job with new vocabulary.
  • There is no reliable rank tracker for generative answers. Anyone selling you a precise AI share-of-voice number is modelling, not measuring.
  • Move 10–15% of the retainer, not 50%. Defunding technical work and links to chase citations is how you lose both.

What generative engines actually cite, and why

Strip the branding off AI Overviews, ChatGPT's browsing mode, Perplexity and Copilot and they share one shape: a query gets rewritten into several sub-queries, each hits a search index, a handful of pages come back, and the model writes an answer out of what it can extract from them. The citation is a receipt for that extraction.

That mechanic explains almost everything about which pages get picked. It isn't mystical and there's no new algorithm to reverse-engineer.

Cited pages share four properties: they were already retrievable for the sub-query, they hold a passage that answers it without the rest of the page, they say something specific enough to quote, and they name entities the model can resolve. A page ranking fifth that holds the answering paragraph beats the page ranking first that buries it.

The deliverables that change, and the ones that don't

Most GEO pitches are a re-skin of an SEO scope of work. Here's the line-by-line, so you can see which parts you'd genuinely be paying extra for.

Every common deliverable, and whether GEO actually changes it.
DeliverableUnder SEOUnder GEOReally different?
Crawling and indexingRequiredRequired — retrieval runs on the same indexNo
Keyword-mapped pagesThe core of the planStill the core; queries are longer and more conversationalBarely
Answer formattingOne snippet target near the topA self-contained 40–60 word answer under every H2Yes
Original statisticsUseful for earning linksThe most quotable unit there is — a model lifts a number and credits the sourceYes
Comparison tablesGood for featured snippetsRows get lifted close to verbatim on "X vs Y" questionsYes
Entity consistencyRarely audited by anyoneName, category, founders, location and pricing must agree everywhereYes
Schema markupRich-result eligibilityHelps entity resolution. Not a citation switch, and nobody has shown it to be onePartly
BacklinksAuthority and discoverySame, plus the unlinked brand mentions that build associationPartly
Core Web VitalsRanking input and real UXAlmost irrelevant to a model reading extracted textNo — keep doing it
llms.txtNot applicableProposed, adopted by no major engine. Twenty minutes to add; expect nothingNo

Entity consistency is the one genuinely new discipline

The other three changes are formatting habits a good editor picks up in a week. Entity consistency is different work, and most teams have never done it.

A generative engine has to decide that the business named in a Bengaluru directory, the one quoted in a trade publication and the domain it just crawled are the same organisation. Everywhere your details disagree, that confidence drops — and a model unsure who you are will leave you out and cite someone unambiguous.

This is unglamorous audit work: one spreadsheet, every surface where your business is described, a column per fact that has to match.

  • Legal and trading name — one form, everywhere. "Pvt Ltd" in some places and not others is a real ambiguity, not pedantry.
  • Category description. If your site says "SEO agency", LinkedIn says "growth partner" and a directory says "web design company", you've described three businesses.
  • Founders and named people — same spellings, same roles, on an about page with sameAs pointing at their real profiles.
  • Location and service area — one address format, and an explicit statement of where you work.
  • Pricing and claims. If your site says ₹75,000/mo and an old press piece says ₹25,000, the model can't tell which is current.
  • Organization schema on the homepage, with sameAs for every profile you control. The cheapest disambiguation signal available.

How to measure this when no rank tracker covers it

There's no rank tracker here, because there's no stable position-based result to track. Answers vary by user, session, phrasing and day. Three honest routes exist, each with a hole in it.

  1. Search Console, read for the signature. Google folds AI Overview impressions and clicks into the standard performance report rather than splitting them out, so you can't isolate them. What you can watch is the pattern: impressions holding or rising on informational queries while CTR falls. That's a pattern, not proof — say so when you report it.
  2. GA4 referrals from assistant hostnames. Traffic from chatgpt.com, perplexity.ai, copilot.microsoft.com and gemini.google.com arrives as referral. Small volumes, usually high intent. Build a custom channel group so it stops hiding inside "Referral" or "Unassigned".
  3. A manual prompt log. Fix a panel of 25–30 prompts a real buyer would type. Run them monthly, same day, logged out, same engines. Record whether you were cited, which page, and who else was in the answer. Tedious, a sample rather than a census, and still the most truthful number here.

The share of a ₹75,000 retainer worth reallocating

Here's our actual call, with the reasoning, because a number without reasoning is a guess in a nicer font. On a ₹75,000/month retainer we'd move roughly 10–15% of the effort — ₹8,000 to ₹11,000 worth of hours — and take it from specific places rather than shaving everything evenly.

  • What we wouldn't defund: technical health, indexing and links. Retrieval runs on an index. Fall out of it and you fall out of the answer.
  • What we wouldn't buy: a separate GEO retainer stacked on SEO. Same team, adjusted version of the same work. A second fee is a charge for vocabulary — our AI search optimisation service sets out the real scope.
  • When to move more than 15%: research-heavy B2B, or categories where buyers ask assistants for shortlists. Move less if you sell an urgent local service.
Where the reallocated hours come from, and where they go.
Take it fromMove it toWhy
One new article a monthRewriting your top 20 existing pages into answer-first shapeThose pages already rank. Reformatting puts them in the retrieval pool now; a new article takes months to get there.
Generic outreach volumeTwo or three digital-PR pieces built on a number only you can publishAn original statistic is the most citable asset you can own, and it earns links at the same time.
New timeOne hour a month on the entity auditCheap, mostly one-off, and it decides whether a model is confident about who you are.
New timeOne hour a month on the prompt logWithout it you have no idea whether any of the above worked.

The verdict, and what to do on Monday

Forced to pick one, pick SEO — not out of caution, but because GEO without indexing and rankings is a scope of work with no distribution attached. Every generative surface reads from a search index, and the index doesn't care what you call your discipline.

If you already rank well and you're watching CTR erode on informational queries, that's the moment GEO earns its 15%. Reformat before you write more. Then publish one number nobody else has.

Monday's list: take your top 20 pages by impressions, add a 40–60 word answer under every H2, fix Organization schema and sameAs, start the prompt log. A week of work, covering most of what GEO means in practice. Longer argument in is generative engine optimisation real.

Related questions.

What is the difference between GEO and SEO?

SEO optimises for a ranked list of links. GEO optimises for a synthesised answer that cites a few sources. The plumbing is shared — generative engines retrieve from a search index — so the difference lands in formatting and entity clarity rather than in a separate discipline. Four deliverables genuinely change; the rest is the same work.

Does GEO replace SEO?

No, and it can't. Generative engines retrieve candidates from a search index before writing anything. If you're not crawlable, indexed and ranking somewhere in the retrievable set, you're not in the citation pool at all. GEO is a layer on top of SEO, not a substitute for it.

How do I get cited by ChatGPT or AI Overviews?

Rank for the sub-questions, then make the answer extractable. In practice: a self-contained 40–60 word answer under every H2, one specific number or definition worth quoting, a comparison table for "X vs Y" questions, and consistent entity data so the model knows who you are. There's no submission form and nobody can guarantee a citation.

Does llms.txt do anything?

Not yet. It's a proposed convention for pointing language models at a clean version of your content, and no major engine has committed to reading it. Adding one costs about twenty minutes, so it's not a bad bet — just don't let anyone bill it as a GEO strategy.

How much of my SEO budget should go to GEO?

Around 10–15% on a ₹75,000/month retainer, taken from article volume and generic outreach rather than from technical work or links. Research-heavy B2B categories can justify more. Urgent local services should spend less — those buyers aren't asking an assistant, they're tapping a phone number in the map pack.

Can I track my AI citations like keyword rankings?

Not reliably. Answers vary by user, phrasing and day, and Google folds AI Overview data into its standard Search Console reports rather than separating it. The honest method is a fixed panel of 25–30 prompts run monthly, logged out, with the results recorded by hand. Treat it as a sample, never as a census.

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