This pages gives you more information about GoogleAds Campaigns.
GoogleAds Campaign: This Line Item corresponds to an existing Google Ads campaign that runs in your Google Ads account. By adding it to your Ad360 campaign, you allow Ad360 to get the data and display it in a central place so that you can compare results of GoogleAds versus over channels. Plus Ad360 can optimize your GoogleAds campaign so that you generate more sales. You need to have linked an existing Google Ads account in your Settings page to run GoogleAds Campaigns.