Admob offers a variety of ad units to choose from, including:
Banner ads: These are small rectangular ads that are displayed at the top or bottom of the screen. They can be static or animated and are typically less intrusive than other ad formats.

Interstitial ads:
These are full-screen ads that are displayed at natural transitions in an app, such as between screens or after completing a level in a game. They can be more engaging for users, but can also be more disruptive if not used appropriately.

Native ads:
These ads are designed to blend in with the content of the app and are typically less disruptive for users. They can be customized to match the look and feel of the app, and can be displayed in a variety of formats, such as as a feed of content or as a recommendation.

Rewarded video ads:
These are video ads that users can choose to watch in exchange for in-app rewards or other perks. They can be a good way to monetize apps while also providing value to users.

App install ads (Cross promotion):
These ads are designed to promote the installation of other apps and can be displayed in a variety of formats, including as interstitials or native ads.

In-app purchase ads: These ads promote in-app purchases and can be displayed in a variety of formats, including as interstitials or native ads.
AdMob Mediation: This is a feature that allows app developers to monetize their app with ads from multiple ad networks, including AdMob, through a single interface.

It’s important to note that Admob has certain guidelines for the types of ads that can be displayed in its network. It’s important to familiarize yourself with these guidelines and ensure that your ad units are in compliance.