What LLM SEO actually changes
Many teams assume LLM SEO is just a new name for SEO. It is not. SEO helps pages get indexed and ranked. LLM SEO is about how those pages are consumed after discovery. A language model needs clear structure, stable terminology, and source chunks that can be reused without ambiguity. If the page is hard to parse or constantly mixes definitions, examples, and promotion, the model is more likely to skip it or cite it poorly.
That is why LLM SEO usually starts in the same places as documentation quality: strong headings, short summary blocks, predictable labels, and clean internal links. It is also why llms.txt became a discussion point. The file is not magic, but it gives teams a way to point models toward the highest-value pages and explain how the documentation set is organized.
The simplest way to think about LLM SEO is this: if a human researcher had to quote your site quickly, would they know which page to trust and where the answer lives? If not, a language model will probably have the same problem.