Google Adwords has a feature that automatically creates custom destination URLs to help us track our ad performance using website tracking programs like Google Analytics.
By Sunil Datar Google+ We we have multiple Ads that link to same page on the website. Then this feature lets us know which Ad was clicked. Basically enabling this feature will add a parameter to our Ads.
To Turn on Adwords Auto-Tagging Follow the steps below. By default Auto Tagging is turned off and has to be turned on by clicking My Account -> Preferences – > In the Account preferences section If Auto Tagging is OFF . Click Edit to turn it on.