The fundamentals that did not stop mattering when AI answers arrived.
Crawlability, structure, internal linking, and technical foundations. Fifteen years of SEO practice did not become obsolete; it became the precondition for being retrievable at all. This topic covers the parts that still carry weight, and the parts that never did.
SEO is not dead, but the claim is not pure hype. Being found now has two layers: ranking in the classic results, and being cited in the AI answers above them. The fundamentals that made you rankable still matter, because AI answers are built on top of them. What dies is treating a ranking as the finish line; the work now is being the source the answer is built from.
In the age of AI, SEO's fundamentals did not stop mattering; they became the precondition for being retrievable. Crawlability, structure, internal linking, and authority are what let an AI find, read, and trust your pages before it can cite them. What changed is the goal: not only ranking a page but being the source an answer is built from, which rewards extractable answers.
Technical SEO for AI crawlers is mostly the technical SEO you know, aimed at new visitors: the bots that build AI search indexes and fetch pages for assistants. They need what classic crawlers need, reachable URLs, fast responses, and content in the server-rendered HTML rather than painted in by JavaScript. Get your content into the initial HTML and let these crawlers in, or you are invisible.