The Iterator design pattern provides a way to traverse a collection of objects in a standardized way without exposing the underlying implementation.

In Java, the Iterator interface is used to implement this pattern. It allows the client to access elements of a collection sequentially without knowing the internal structure of the collection.

I have not used the Iterator pattern personally but it can be used to implement a custom pagination logic for a web application.

The pros of using this pattern include separation of concerns, flexibility, and abstraction. The cons include added complexity and potential performance overhead due to the additional abstraction layer.