We’ve recently made some updates to our AdMob Help Center to help provide further guidance on implementing banner ads. These best practices, along with examples of what you should and shouldn’t do, are designed to help developers implement banner ads.
Mobile devices have limited screen size, which means that careful planning for your ad placement is especially important. Improper implementation can lead to accidental clicks, and our goal is to build a strong ecosystem that benefits users, advertisers and developers in the long term.
Close proximity of banner ads to other elements within an app is one of the biggest causes of accidental clicks. To avoid accidental clicks, banner ads should not be placed next to interactive navigational buttons, such as a “next” button or on a game play screen where users are continuously interacting with the app.
For example, separating the banner ad from app interactive elements helps reduce user confusion and the likelihood of accidental clicks. Poor ad implementations often cause high levels of invalid activity due to the proximity of the ad to app clickable elements.
More examples and details, along with additional visual examples of best practices can be found on the AdMob help center.