In a call funnel, a booked call is the conversion the ads optimise for, but a booking isn't revenue. The ads that book the most calls are often not the ads that book qualified ones.
BrainyMetrics records booked calls from Calendly, Acuity Scheduling, OnceHub, Zapier/Make or the API, matched to the person by email, phone or visitor id. A booked call counts as a conversion unless it's cancelled. Set each call's outcome (showed, no-show, qualified, unqualified, closed with a deal value, lost) and the Attribution report shows Booked and Qualified columns per source, plus cost per qualified call.