Traffic from ChatGPT, Perplexity and AI Overviews lands as (direct) or isn't captured at all in GA4 — so you can't prove it drives revenue. I build the measurement layer for AI search: (1) visibility monitoring of your prompts across ChatGPT, Perplexity, Gemini and AI Overviews; (2) correct GA4 capture of LLM referral sessions via specific regex; (3) LLM crawler tracking (GPTBot, OAI-SearchBot, PerplexityBot…); (4) BigQuery attribution connecting cited prompts to revenue. Initial audit in 5–7 days; optional monthly dashboard.