The data from multiple sources is collected by aggregators. In theory, its "anonymous" because it doesn't have your name and address on it. But in reality it co

The data from multiple sources is collected by aggregators. In theory, its "anonymous" because it doesn't have your name and address on it. But in reality it contains hundreds of data points including everything from your TV watching habits (from your smart TV and streaming services) to your credit card history (sold by the card companies and retailers) and much more. Customers who match the criteria selected by advertisers can be targeted for other ads -- on different websites, streaming channels, by mail, etc. So this is how advertisers have access to information about you which they, themselves, did not collect.