The Floodlight Counter tag allows you to count the number of times someone visits your site after clicking on an advertisement for it.
https://support.google.com/tagmanager/answer/6107168?hl=en
Advertising
Get access to data on 499,144 websites that are Google Floodlight Counter Customers. We know of 141,916 live websites using Google Floodlight Counter and an additional 357,228 sites that used Google Floodlight Counter historically and 83,695 websites in the United States.
Get a list of 499,144 websites using Google Floodlight Counter which includes location information, hosting data, contact details, 141,916 currently live websites and an additional 1,059,846 domains that redirect to sites in this list. 357,228 sites that used this technology previously and 83,695 websites in the United States currently using Google Floodlight Counter.
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