1. Create an Admob account. Please see details for signing up here: https://www.google.com/admob/index.html

2. Go to your site Admin Area > Plugins > Skadate Android > Settings > Ads, enter Ad unit ID and click save.

To find the ad unit ID, click the Monetize tab. Select an app from the list of apps in the sidebar. The ad unit ID is listed below the ad unit name.

You can find more detailed information on AdMob here: