Summary
Meta's default attribution is 7-day click and 1-day view. Click attribution, which records an ad click, can be tracked and verified by 3rd-party platforms. In contrast, view attribution takes credit for a purchase even if the ad was only viewed, not clicked. The 1-day view can't be verified due to inaccessible Meta's impression logs and pixel data. It's crucial to separate it from the 7-d click for accurate attribution and use 1-day view as a reference only.
