Attribution is only as good as your tagging. One Meta ad without URL parameters and its sales show up as organic social, because Facebook adds fbclid to organic posts too.
Settings → Install has ready-made URL parameter templates for each platform, and Settings → URL builder turns any landing page into one tracking URL. It keeps your existing parameters and anchors, replaces stale UTMs, and removes hard-coded click ids. The Attribution report then checks your tagging continuously: a yellow warning appears when a platform with spend sends untagged clicks, or when clicks arrive without ad ids so spend can't be joined below the platform level.