AdMob is a mobile advertising platform that allows app developers to monetize their apps by displaying ads to users. AdMob is used by app developers to generate revenue from their apps by showing ads to users and earning money when users interact with the ads.

AdMob offers a range of ad formats, including banner ads, interstitial ads, and rewarded video ads, which can be customized to fit the needs of the app. App developers can use AdMob to show ads to users of their app, as well as users of other apps that are part of the AdMob network. This can help app developers reach a wider audience and generate more revenue.

In addition to its core advertising platform, AdMob also offers tools for app developers to track the performance of their ads and optimize their campaigns for better results. These tools include detailed analytics and reporting, as well as A/B testing and audience segmentation capabilities.

Overall, AdMob is used by app developers as a way to monetize their apps and generate revenue through mobile advertising.