This articl introduces you to the concept of the identity graph. This is a graph created by advertisers linking all your identifiable information together to create a picture of a single individual out of distributed data. This article is a leisurely read and doesn't get too complex, though it's a bit long. For more on identity graphs: What is an Identity Graph, 6 Things Every Marketer Need to Know. Note that while the identity graph originates as a marketing concept, it is not exclusively a marketing concept, and something people and organizations can take control of in their own right.