Adalysis will alert you to product groups with poor conversions. This means you can restructure, exclude or change your bids for those groups.
You'll see the alert on your Audit alerts screen. Click for a list of affected product groups.
By default, this alert is based on zero conversions and 150 clicks in the last 90 days. Go to Audit > Audit settings > Prebuilt > Assets (extensions) to change these thresholds.
You can always revert back to the original settings by clicking Reset to default.