The feed health checklist I run before every account audit
Feed quality is the hidden layer behind many poor Shopping and PMax accounts. Here is the checklist I use before touching campaign structure.
When Shopping performance is weak, the problem is often upstream from bidding. Coverage gaps, disapprovals, missing identifiers, and weak title logic all reduce the quality of the traffic before the account structure has any chance to help.
That is why I always inspect feed health before making campaign-level judgments. Better feed quality produces better traffic, clearer diagnostics, and more defensible optimization decisions.