SEO vs AEO: How AI Search Is Changing What Businesses Need to Optimise For

SEO vs AEO: How AI Search Is Changing What Businesses Need to Optimise For

Google AI Overviews now appear in approximately 15% of searches globally and growing. ChatGPT Search, Perplexity, and AI-powered search tools are handling millions of queries that would previously have been directed to traditional blue-link results.

This is not a future concern. The shift is happening now, and it is changing which businesses get found and which get skipped.

Understanding the difference between SEO and AEO, and what you need to do about each, is practical work for 2026, not a speculative exercise.

The Distinction

SEO (Search Engine Optimisation) optimises your web pages to rank in traditional search results: the blue links that appear when someone searches on Google. The user sees a list of results, clicks one, and arrives on your website. Traffic goes through your site. You measure it in clicks.

AEO (Answer Engine Optimisation) optimises your content to be cited directly by AI systems that generate answers rather than lists of links. When someone asks ChatGPT "what is the best CRM for a consulting firm with 10 employees?" or asks Google a complex question that triggers an AI Overview, the AI generates an answer from sources it has assessed as authoritative. Your content is cited (or not) in that answer. The user may not click through to your site at all.

The key difference: SEO drives clicks to your website. AEO gets your content cited in answers that may be the user's final destination, with or without a click.

Does AEO Replace SEO?

No. AEO supplements SEO without replacing it.

Traditional search results still account for the majority of search traffic. The technical foundations of good SEO, fast load times, crawlable architecture, quality content, authoritative backlinks, are also prerequisites for AEO performance. A site that Google trusts as authoritative is more likely to be cited in AI-generated answers than one with poor SEO signals.

The businesses that will lose ground in the next two to three years are those that rely entirely on blue-link clicks without adapting to how AI systems surface information. The businesses that gain ground are those that do both.

What AI Systems Actually Cite

Understanding what AI systems look for helps you optimise effectively.

Self-contained, direct answers. AI systems extract content that directly answers a query without requiring the reader to visit the page for context. Content that answers in the first 40 to 60 words after a heading is prioritised over content that builds to an answer over multiple paragraphs.

Structured data. FAQPage, HowTo, and Speakable JSON-LD schema markup signals to AI systems that specific content blocks are designed to be extracted as answers. Google's AI Overview system explicitly uses structured data as an input.

Named sources and specific numbers. Generic claims ("costs vary") are less likely to be cited than specific, attributable figures ("a full implementation costs $15,000 to $40,000 according to our analysis of 50 client projects"). AI systems cite content that sounds authoritative, and specificity is a signal of authority.

Topical authority. AI systems do not cite random pages. They favour content from domains with demonstrated expertise in the topic. A site with 20 articles all covering related aspects of a topic is more likely to be cited than a site with one article on the topic.

The Practical AEO Changes to Make

1. Rewrite Your Content Structure

Traditional SEO content often builds context before answering: introduction, background, context, and then the answer near the end. AEO content answers first and provides context after.

For a question like "How long does CRM integration take?", AEO-optimised content puts the specific answer in the first sentence after the heading: "A complete CRM integration between two systems typically takes 3 to 6 months, depending on data complexity and integration approach." The detail and reasoning follows.

This change does not require writing new content. It requires editing existing content to front-load answers.

2. Add FAQPage Schema

Every major service page and blog post should include FAQPage schema in JSON-LD format. FAQPage schema marks up question-and-answer pairs in a format that AI systems and Google's rich results can extract directly.

The FAQ content should cover the actual questions your prospective customers ask, answered specifically. Generic questions with generic answers will not be cited. Specific questions with data-backed answers will.

3. Build Speakable Schema for Key Passages

Speakable schema marks specific passages as appropriate for text-to-speech and AI extraction. For key factual statements on your most important pages, marking these passages with SpeakableSpecification schema signals that this content is designed to be extracted as a self-contained answer.

4. Create Topical Authority Through Cluster Content

AI systems do not cite isolated pages. They favour domains that demonstrate depth across a topic. A cluster of related pages covering your area of expertise from multiple angles creates the topical signal that makes individual pages more likely to be cited.

For a software development company, a cluster covering "offshore development costs," "offshore team structure," "offshore quality control," and "offshore contracts" creates depth that no single page can match.

Measuring AEO Performance

Traditional SEO is measured in rankings and clicks. AEO adds two new measurement categories:

AI Overview appearances: Google Search Console shows when your pages appear in AI Overviews and how many clicks they generate. This data is available under the Search Results report, filterable by "AI Overviews."

Brand mentions in AI tools: manually test key category queries in ChatGPT Search and Perplexity. Search "best [your category] company in [your market]" and related questions. Note whether your business is cited and what the sources are. This is not automatable at low cost but is worth doing manually on a monthly basis.

The goal is not to replace click-based traffic measurement but to add visibility into the AI citation layer of your search presence.

The Timeline

AEO changes can show impact faster than traditional SEO. Google recrawls frequently updated pages and the AI Overview system updates more often than traditional ranking positions. FAQ schema and direct-answer content changes have shown up in AI Overviews within two to four weeks for pages already on the first page of results.

Pages that are not yet ranking will not appear in AI Overviews regardless of schema or content structure. The path to AI citation still runs through foundational SEO authority.

The sequencing: build SEO authority first, then apply AEO optimisations to pages with sufficient authority to appear in search results. The combination produces the strongest position.

For help implementing both SEO and AEO optimisations for your business, our SEO team handles the technical implementation and content strategy. Contact us to discuss your current position.