How do you add SEO, GEO and AEO to an existing website?
Without touching the design, in four layers: first measure the site from outside as a search engine sees it and fix indexability, canonical, hreflang, sitemap and performance basics (found); then tell machines what each page is about with structured data, topic clusters and internal-linking architecture (understood); build a structure AI systems can cite with verifiable claims, answer-first copy and llms.txt (trusted); and measure form, phone, email and WhatsApp contacts under one identifier (chosen). Which items are needed is decided by measurement; an item the platform does not allow stays out of the proposal.

