- A desktop unit is serving on mobile
- A mobile unit is serving on desktop
Step 1: Validate if this was intentional. Be mindful of Google Policies on ad placements:
Step 2: Open your PubGuru header bidding configuration and audit the device dropdown per ad unit
Step 3: If you have an OFF-page + responsive setup, when adding the ad unit twice, Device needs to be specified for each and corresponding Placement IDs/parameters added:
Step 4: If you have an ON-page setup, check that Device detection codes are set to properly load the ads based on device
Remove any ad unit in the configuration that should not be part of the ad map.