Optimization works best as a sequence of checks, not as a hunt for one magic setting. Review the account in the same order each week so that changes remain explainable.
1. Confirm measurement before judging performance
Check that primary conversions represent real business outcomes, values are passed consistently and recent site changes have not interrupted tracking. A campaign cannot optimize toward a signal that is missing or misleading.
2. Separate demand changes from campaign changes
Compare the same weekday ranges and note promotions, stock issues, seasonality and major budget changes. This prevents normal demand variation from being mistaken for an account problem.
3. Review queries, placements and audience signals
Look for patterns that reveal mismatched intent. Add exclusions only when the evidence is clear, and avoid blocking useful reach because of a single unusual click.
4. Check budget and bidding together
A constrained budget, a strict target and limited conversion data can pull in different directions. Record which constraint you change and give the campaign enough time to respond before changing another.
5. Treat ads and landing pages as one experience
The promise in the ad should continue on the landing page. Review message match, page speed, mobile usability and the clarity of the next action before assuming targeting is the only issue.
A useful weekly note
Write down what changed, why it changed, the metric expected to move and the date for the next review. This small habit turns optimization into an evidence trail.