Go to Admob to create your account our to sign in to your existing Admob Account. Click Start if this is a new account or click Monetize New App on the Home page for returning users!
Type in the name of your App, click search and select the App you want to Monetize or manually enter the App name and platform.
Then select if you want a Banner or Interstitial Ads. You will need to pick your refresh rate between 30-120 seconds. Select the style of your ad or customize it! Then create a unique Ad Unit Name and Click Save.
Copy the Ad Unit ID provided.
Return to GameSalad Creator and Publish your Game. On your publishing page select Admob Banner or Admob Interstitial depending on what kind of Ad you picked.
Then go to Services in the left hand toolbar. Select Admob and input your Ad Unit ID.
Publish your Game with Ads from Admob to the Platform of your choice!