This free tool in AdWords can show you what happens after customers click your ad (for example, whether they purchased your product, called from a mobile phone or downloaded your app).
https://support.google.com/adwords/answer/1722054
Analytics and Tracking · Conversion Optimization · Conversion Tracking
Get access to data on 7,932,355 websites that are Google Conversion Tracking Customers. We know of 2,035,844 live websites using Google Conversion Tracking and an additional 5,896,511 sites that used Google Conversion Tracking historically and 809,825 websites in the United States.
Google Conversion Tracking websites that are also using other technologies.
Get a list of 7,932,355 websites using Google Conversion Tracking which includes location information, hosting data, contact details, 2,035,844 currently live websites and an additional 2,534,792 domains that redirect to sites in this list. 5,896,511 sites that used this technology previouslyand 809,825 websites in the United States currently using Google Conversion Tracking.
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