What you are being sold
Four things vendors charge for that do not do anything.
Every one of these is contradicted by the search engines' own published documentation. We are not being contrarian — we are reading the manual, which is free and which almost nobody selling this has done.
“Add an llms.txt file so AI can read your site”
No major answer engine documents reading it. Google names it directly as something its Search systems do not use. It is a proposal, not a standard, and it is the most commonly upsold non-deliverable in this category.
“You need special schema markup to get cited by AI”
Structured data earns rich results and helps engines tell one business from another. Google states plainly that it is not required for its generative features. Markup is worth doing correctly and worth nothing as a citation lever.
“AI Overviews are a separate channel needing separate work”
Google's own guidance is that its generative features run on the core Search ranking systems, and that a page needs no optimization beyond being indexed and snippet-eligible. Anyone selling a distinct AI Overviews retainer is selling your SEO back to you twice.
“A tool can track your AI rankings”
Google says no third party has access to its ranking or AI systems. Search Console reports impressions in generative features for some properties, with no clicks and no query breakdown. Anyone promising an AI rank tracker is charging for a guess.