Buyers now ask ChatGPT, Perplexity, and Google AI Overviews before they ever click a blue link. Most SaaS content programs are still optimized only for classic SERPs. This talk covers how I treat generative engine optimization as an entity and evidence problem: schema, sameAs graphs, quantified proof, and pages that models can cite without hallucinating. I will walk through a practical GEO audit for a B2B SaaS site, what to change in 30 days, and how this connects to (not replaces) technical SEO and conversion.