Classic SEO wins the ranked link. Someone types a query, sees your page near the top, and clicks. That channel is not going anywhere, and for most businesses it is still the largest source of qualified organic demand.
AI SEO wins the generated answer. When a buyer asks ChatGPT, Perplexity, Gemini or Google AI Overviews, the model names a handful of sources and moves on. If you are not one of them, the click never happens, no matter how well you rank.
The two share foundations, clean technical signals and genuine authority, but they need different content. Answer engines quote structured, extractable passages and trust entities they can verify off-site. Winning both means writing for the human reader and the model reading over their shoulder.