What concrete metric should I show a client to prove progress if signals don’t guarantee sales?

Treat AI visibility signals as evidence, not results. To show progress to a client, track several elements over time: discovery events, first-party retrievals with approved facts, and any confirmed referrals. Also measure how much of the core customer questions are covered by the approved knowledge and whether the outputs include visible citations. Compare a baseline to current results and explain that improvements reflect deeper knowledge and better answer quality, not guaranteed sales. Use a simple dashboard to show changes in coverage, consistency of facts, and the structure of outputs, then decide next steps like adding Q&A or updating facts. Do not imply revenue is guaranteed from AI signals.