Large Ad Size Configured for Mobile. Here’s How To Fix It.

A desktop ad size was detected on mobile. This is against Google’s policy and could negatively impact earnings.


Step 1: Validate if this was intentional. Be mindful of Google Policies on ad placements:

Step 2: Open your Ad Manager account > Inventory > Ad Units

Step 3: Audit the sizes per ad unit and edit if necessary

Ad Unit size

Step 4: Log into

Step 5: Open the relevant PubGuru Header Bidding configuration

Step 6: Audit the ad sizes you have configured per ad unit

ad unit

Step 7: Remove/add any ad size that is incorrectly configured

Step 8: Save & publish

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