Google now lets AdWords advertisers view the Return on Ad Spend (ROAS) from their campaigns in Google Analytics. Previously, data on the Return on Investment and Margin was available in Google Analytics which will now be replaced by Return on Ad Spend.
Return on Ad Spend gives you the amount of revenue generated for each dollar spent on AdWords. The revenue is based on either e-commerce revenue or goal value in Analytics.
In order to see the AdWords reports in Analytics, you have to link your AdWords and Analytics accounts and then enable auto-tagging. To get the Return on Ad Spend data click on Acquisition> AdWords> Clicks.AdWords Return on Ad Spend now Available in Google Analytics!,