It's really simple to use Revmob with Buildbox.
1. First, click on the gear button on the right top side of your project window to open your Project Settings:
2. Copy and paste your App ID to the RevMob Media ID field. You have to do this for each Application Store you select and use the corresponding App ID (either iOS, Android or Amazon). You can also set your own Priority List of Ad Networks for banners and interstitials:
3. Go to Menu Editor and select the UI in which you would like to show your ads. You will have an option to show interstitial or banner ads, and to choose which Ad Network to use. There is also an option to set a frequency of when your ads will be shown (e.g. every time or every 5th time the screen is shown):