Full Definition
Search Engine Optimization (SEO) is the discipline of improving a website's visibility and ranking in traditional search engine results pages. It encompasses technical factors such as site speed, crawlability, and structured data; on-page factors such as keyword relevance, heading structure, and content quality; and off-page factors such as backlink authority and brand mentions across the web.
SEO and AEO share significant common ground. The technical hygiene that supports SEO indexing also supports AI retrieval. The authority signals that drive SEO rankings, particularly third-party links and citations, also contribute to AI platform trust assessments. The content quality standards that Google rewards, specifically expertise, experience, authoritativeness, and trustworthiness, align closely with what AI platforms look for when selecting sources to cite.
The differences are also real and worth understanding. SEO optimization targets ranking positions in a list of blue links, where click-through rate and on-page engagement are the downstream metrics. AEO optimization targets inclusion in a synthesized AI response, where the downstream metric is brand presence in the answer regardless of whether a click occurs. SEO rewards keyword relevance and link authority. AEO rewards entity clarity, structured content, and consistent representation across sources.
For most B2B companies, a strong SEO foundation is the right starting point for AEO work. The two disciplines reinforce each other when executed well. Where they diverge is in content format: SEO content is often written to rank for a keyword, while AEO content is written to answer a specific question in a form that AI can extract and cite cleanly.