AI SEO: what AI changes for search optimization

AI SEO: what exactly are we talking about?

The term “AI SEO” covers two practices that search results pages often mix up. Separating them avoids misdirected budgets.

Meaning	What it covers	Question to ask
AI in the service of SEO	Analysis tools, keyword clustering, writing assistance, audit scripts	Does the tool save time without lowering quality?
SEO for AI engines (GEO)	Being used or cited in a generated answer: AI Overviews, AI Mode, ChatGPT, Perplexity, Copilot	Do my brand and my pages appear in the answers?

The second meaning goes by several names: GEO (Generative Engine Optimization), AEO (Answer Engine Optimization), LLMO. They all refer to the same work. The term GEO comes from a paper by six researchers, published on arXiv in November 2023, then presented at the ACM SIGKDD 2024 conference. Our complete GEO guide details this framework.

What changes for organic search?

Three changes are documented in 2026. They affect measurement and the distribution of clicks, not the technical fundamentals.

Clicks become scarcer on queries with an AI summary

Seer Interactive tracked 53 brands and 5.47 million queries between January 2025 and February 2026. In February 2026, the organic click-through rate reached 2.36% when an AI Overview is displayed, compared with 3.82% without one (Seer Interactive, April 24, 2026). How these summaries work is detailed on our page about Google’s AI Overviews.

How to read it: being cited limits the loss without making up for it. Seer notes that the 0.94% figure is pulled down by a single account; without it, it is close to 1.61%. In France, these surfaces have been active since the rollout of AI Overviews and AI Mode on July 22, 2026. Any analysis of organic traffic there must compare before and after that date.

Reputation weighs more than links

Across 75,000 brands, Ahrefs measured the correlation between several signals and presence in AI Overviews. Web mentions of the brand come first (0.664). They are followed by link anchors (0.527), branded search volume (0.392) and the number of backlinks (0.218) (Ahrefs, May 26, 2025).

This is a correlation, not proof of causation. It is enough to steer priorities towards the brand’s presence outside the site.

Engines do not cite in the same way

Semrush analyzed 126 million prompts between January and April 2026. ChatGPT cites about 15 sources per answer, Gemini about 3. On Gemini, the overlap between brands mentioned and domains cited can drop to 30% (Semrush, June 26, 2026). An AI SEO strategy therefore tracks each engine separately, and distinguishes brand mentions from page citations.

What does not change?

Google says it plainly: SEO best practices remain relevant, because its AI features rely on its ranking and quality systems (Google Search Central, updated on July 10, 2026). The same guide makes three useful points:

• no AI-specific file, markup or special Markdown is needed to appear in Google Search;
• structured data is not required for generative search, and no special schema.org markup exists for it;
• nothing requires breaking content into tiny chunks for an AI to understand it.

The foundation therefore stays the same: crawlable and indexable pages, one page per intent, an identified author, dated sources. The trust signals of the E-E-A-T framework serve ranking and citation alike.

How can you use AI for SEO safely?

Google allows generative AI in content production, with a clear limit. Generating many pages with no added value for the user may violate its policy on scaled content abuse (Google Search Central, updated on December 10, 2025). The criterion is the value provided, not the tool used.

SEO task	What AI brings	Essential human check
Keyword research	Grouping by intent, ideas for long-tail queries	Real volumes from a data tool, not from the model
SERP analysis	Summary of recurring formats and questions	Reading the pages directly, with the date of collection
Writing	Outline, rewording, title variants	Facts, figures, primary sources, real experience
Technical audit	Scripts to analyze crawls or logs	Interpretation and prioritization
Metadata	Suggested title tags and meta descriptions	Accuracy and uniqueness, page by page

The main point of vigilance remains accuracy. A language model can invent a figure or a source. Every published data point must link to its primary source, with a date. The detailed method is described in our SEO writing guide.

How do you optimize a site for AI engines?

AI SEO for answer engines is built in four workstreams, in this order. Moving to the next one too early means optimizing pages that the engines cannot read.

1. Open access: check that robots.txt and the CDN layer let answer engines’ index crawlers through. Details for each crawler are on our page GPTBot and AI crawlers.
2. Make pages citable: a direct answer at the top, sections that make sense on their own, headings phrased as questions, sourced and dated figures.
3. Work on the brand outside the site: trade press, customer reviews, comparison sites, communities. Mentions correlate more than links.
4. Measure: a fixed panel of prompts, the AI report in Search Console, citations in Bing Webmaster Tools, referral traffic. The method is detailed on our page on how to measure AI visibility.

Published studies give an order of priority, not guarantees. The founding GEO paper measures a visibility gain when statistics and cited sources are added. It measures a loss with keyword stuffing (Aggarwal et al., 2023, cited above). Its setup only counts five sources per query: keep the order of the levers, not the percentages.

ChatGPT combines internal knowledge and web search: its case is covered in our article on ChatGPT SEO.

Where should you start when you manage a marketing budget?

For a decision-maker, the question is not choosing between SEO and AI SEO. It is deciding what share of editorial effort and brand presence targets citation. Three signals justify speeding up:

• a large share of your target queries already shows an AI Overview (to be measured on a dated export);
• your sector is mostly informational, with long questions;
• your brand has a verifiable reality: products, prices, reviews, press.

On the other hand, postpone if the site is being redesigned, poorly indexed or has no conversion tracking. No citation work makes up for a site that engines crawl poorly.