More review, less history
A new domain and a new Merchant Center go through additional checks. Nothing about your store is known, so trust signals do more work than usual: real contact details, policies that state timelines, a checkout that completes.
The bidding has nothing to learn from
No conversion history means automated strategies are guessing. Start manual or on maximise conversions, and move to target-based bidding only once there is a real history.
What shortens it
- Fix everything before the first review rather than appealing repeatedly.
- Start on Search, which produces clean data fastest.
- Change one thing at a time, so the first month teaches you something.