A relatable, simplified, example: If you withdraw $3858.28 from a bank under the name Alice, and then deposit $3858.28 in a different bank under the name Bob,

A relatable, simplified, example: If you withdraw $3858.28 from a bank under the name Alice, and then deposit $3858.28 in a different bank under the name Bob, and those two banks share data, then someone could reasonably say Alice and Bob are connected.