CAPI · Conversions API
Meta's equivalent of Enhanced Conversions: sending conversions from the server rather than the browser.
Technical meaning
A server-to-server connection between the website (or CRM) and Meta, which complements the pixel blocked by browsers and ad blockers. It also reports events the pixel never sees, such as a confirmed meeting or a signed sale. Contrast sets it up server-side for every Meta account it runs.
See Google and Meta campaigns