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 7,442,941 websites that are Google Conversion Tracking Customers. We know of 1,873,678 live websites using Google Conversion Tracking and an additional 5,569,263 sites that used Google Conversion Tracking historically and 816,475 websites in the United States.
Google Conversion Tracking websites that are also using other technologies.
Get a list of 7,442,941 websites using Google Conversion Tracking which includes location information, hosting data, contact details, 1,873,678 currently live websites and an additional 2,505,525 domains that redirect to sites in this list. 5,569,263 sites that used this technology previously and 816,475 websites in the United States currently using Google Conversion Tracking.
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