Reddit shilling, but with content that tries to very specifically fit questions that people will ask AI. If there aren’t a lot of sources available, you can get AI to play back your desired answer almost verbatim.
These are probably the state of the art of methods which are not straight up blackhat spammy stuff.
The terms are: Answer Engine Optimisation (AEO) Generative Engine Optimisation (GEO)
(s>z for American cousins)
https://digiday.com/media/wtf-are-geo-and-aeo-and-how-they-d...
https://www.anthropic.com/news/golden-gate-claude
Edit: I misread the question, I thought you were asking about how OpenAI can bias their models. No idea how you can LLMO your page. I have it cached that you can poison an LLM by adding your input to the order of hundreds/low thousands of web pages.
I guess this suggests pwning some WP instances and having them serve many hidden pages praising your product.