Do I optimize for Google or for AI assistants, and does the work overlap?

The question underneath this one is a budget question

Somebody has quoted you for a second program. Or you have been reading about generative engine optimization. The question underneath is whether your search work now needs a second invoice.

One foundation serves both surfaces. Four items sit on top of it, and each one is small enough to name in a sentence.

The published research looks like it says the opposite.

The overlap studies contradict each other, and the reason is the question

Ahrefs ran 15,000 long-tail queries through Google and Bing, then asked four assistants the same questions. Only 12% of the URLs the assistants cited also ranked in Google's top 10 for that query. Around 80% did not rank anywhere in Google for it.

BrightEdge watched AI Overviews for 16 months across nine industries and found the opposite trend. Overlap between citations and organic rankings climbed from 32% to 54%. In healthcare, insurance, and education it reached 68% to 75%.

Both studies are competent. They answer different questions, and the word "overlap" hides the difference.

The first question is narrow. Does the page ranking first for your exact query get cited in the answer to it?

Increasingly it does not. Google splits a question into sub-questions and pulls sources for each one. The answer draws on pages that never ranked for what the person typed.

The second question is broader. Does ranking well make you likelier to be cited at all?

There the evidence points the other way. Being visible in search keeps predicting being visible in answers, across industries and across studies.

A proposal quoting the first number to justify a second program answers a question you did not ask.

One foundation feeds both

The shared part is most of the work, and it is the part you were already doing.

Your pages have to be reachable and indexed. They have to say something a summary cannot assemble from other people's articles.

Your name, your firm, and what you do have to read consistently everywhere a machine can find them. Other credible sites have to corroborate it.

Google's documentation is blunt about the mechanics: no separate markup, no special files, no second ranking system. Citation in an assistant runs on entity clarity, corroboration from others, and visible evidence of experience. Those are the same inputs search rewards, which is why the foundation is shared.

Four places the work diverges

The first difference is that mentions matter more than links. Ahrefs studied 75,000 brands. Branded web mentions correlated with AI Overview visibility at 0.664, against 0.218 for backlinks.

A follow-up across ChatGPT and AI Mode put YouTube mentions at the top. Ahrefs is careful to say these correlations are moderate to weak and do not prove cause.

Read them as a nudge on where effort goes. Being discussed by other people counts for more than being linked by them.

The second difference is crawler access, and it is the one that quietly deletes practices from answers. Assistants use their own crawlers, and hosts have started blocking them.

Cloudflare set new zones to block AI bots by default in July 2025. It now sorts bots into search, agent, and training categories. From September 15, 2026, training and agent crawlers are blocked by default on pages carrying ads.

A site with no ads is mostly unaffected by that change. The older blanket setting is a different matter. It is still switched on for sites whose owners never chose it.

The third difference is the shape of the question. People type keywords into Google and sentences into an assistant.

Write pages that answer a whole question, in the words a person would say out loud. Those pages get pulled into more sub-questions.

The fourth difference is measurement, and it is worse than what you are used to. Cited sources turn over heavily from month to month.

Between 40% and 60% of them change across Google AI Mode and ChatGPT. No assistant gives you the query behind a citation.

That is the list. Every item on it is a change of emphasis inside work you already fund.

Check the crawler setting before you buy anything

Open your host's bot rules and find out whether the assistants can read your site at all.

On Cloudflare that lives under the security settings, in the AI bot controls. Elsewhere it may sit in a firewall rule or a security plugin. It may also be a line your developer added in 2024, when blocking AI crawlers looked prudent.

A blocked crawler produces exactly the symptom that sells a second program. Your site ranks. The assistants have never heard of you.

No amount of new content fixes a 403.

What the second program costs, and what it buys

Published ranges put a separate AI visibility retainer between $2,000 and $15,000 a month. That sits alongside whatever you already pay for search work. The firms publishing those ranges sell the service, so read them as asking prices rather than as market truth.

The scope sheets are where the question settles. Put the two side by side and mark every line the second program does that the first does not.

Most of the marketing industry has already run that comparison. Fractl surveyed 343 marketing decision-makers in July 2026. It found 81% still call this work SEO, and fewer than one in five use the newer label.

Google adds a warning worth carrying into the meeting. No third-party tool has access to its ranking or AI systems, whatever a dashboard implies. Much of what the newer label covers is work you can name and price yourself.

Where the money moves instead

Funding one program does not mean spending the same money on the same things.

The shift is toward being talked about somewhere other than your own site. That means being interviewed, quoted, and reviewed by people whose audiences already exist. It also means video, which the correlation data keeps putting near the top.

The shift is also toward fewer pages, written to answer whole questions rather than to cover a keyword list. On both surfaces, the page nobody else could have written is the one that gets used.

None of that arrives as a new line item. It arrives as a different brief for the work already running.

What one program will not do

It will not guarantee that any assistant cites you. Nothing on offer does, at any price, and the evidence behind every recommendation here is correlational.

It will not make one surface stand in for the others. Being cited by ChatGPT tells you little about Perplexity or Gemini. Each builds its answers from a different set of sources.

It will not stay done. The engines change their source selection on a schedule nobody publishes. This is a standing line item rather than a project with an end date.

And it will not save you from the harder thing, which is publishing material worth citing. That part has no shortcut on either surface.

You are funding one body of work with two audiences reading it.

Write the two scopes side by side. Mark every line the second one does that the first does not. That list is usually shorter than the invoice suggests.