Agentic Search Optimization (AEO) is the practice of structuring web content so that AI agents — ChatGPT, Perplexity, Claude, Google AI Overviews — can read, understand, and cite specific pages as authoritative answers to user queries. Unlike traditional SEO which optimizes for keyword rankings in blue-link results, AEO optimizes for inclusion in AI-generated answers, summaries, and recommendations. The key technical components are FAQ schema markup, HowTo schema, outbound citations to authoritative sources, and declarative about paragraphs that read like encyclopedia entries rather than marketing copy.

AI agents like ChatGPT and Perplexity pull from pages that are structured as answers — pages that clearly state what something is, who it is for, how it works, and what the output is. Pages that are written primarily as marketing copy (taglines, benefit lists, vague value propositions) are not structured in a way that AI can extract as a citation. Businesses that are invisible to AI are typically not missing information — they are missing structure. The same information rewritten as declarative sentences with schema markup and outbound citations becomes citation-ready.

FAQPage schema is a structured data format defined by Schema.org that marks up question-and-answer content on a web page in a machine-readable JSON-LD format. When an AI agent reads a page with FAQPage schema, it can extract the specific questions and answers as structured data — making it far more likely to cite that page when a user asks a related question. Google uses FAQPage schema to power featured snippets and AI Overviews. ChatGPT and Perplexity extract FAQPage content as citation-ready information even when they cannot process the visual layout of the page.

SEO (Search Engine Optimization) optimizes for ranking in traditional keyword-based search results — the blue links on Google. AEO (Answer Engine Optimization or Agentic Search Optimization) optimizes for inclusion in AI-generated answers and recommendations. The audiences are different: SEO targets Google's ranking algorithm; AEO targets the large language models that power AI search tools. The techniques overlap in some areas (quality content, authoritative sources) but diverge significantly in structure — AEO requires schema markup, declarative copy, outbound citations, and structured fact tables that are not necessary for traditional SEO.

AI agents are trained on content from across the web and implicitly learn to treat pages that cite authoritative external sources as more credible and publisher-like than pages with no outbound links. When a web page links to NOAA for weather statistics, the Bureau of Labor Statistics for employment data, or a peer-reviewed source for industry claims, it signals to AI that this page is a primary source publisher rather than a marketing page. This is the same signal that academic citation builds for published research — credibility through association with authoritative sources.

AI citation is not as deterministic as Google ranking — there is no confirmed timeline for when a newly optimized page will appear in AI-generated answers. However, pages with complete schema markup, outbound citations, and declarative copy typically begin appearing in Perplexity and ChatGPT responses within 2 to 6 weeks of being indexed. Google AI Overviews have their own indexing timeline. The most important factor is whether the page genuinely answers a question that users are asking AI tools — structure amplifies relevant content, but cannot substitute for it.

B2B service businesses, agencies, professional service firms, SaaS companies, and local businesses in high-consideration categories benefit most from AEO. These are businesses where buyers research online before making contact — and increasingly use AI tools for that research. A law firm, accounting firm, marketing agency, or specialized B2B service provider that is recommended by ChatGPT or Perplexity in response to a relevant query gets a qualified inbound lead at zero cost per click. The competitive advantage goes to whoever builds this infrastructure first in their market.