What are the advantages and disadvantages of using the Iterator pattern?

The Iterator pattern provides several advantages, such as promoting decoupling between the collection and the traversal logic, allowing multiple iterations over a collection without exposing its internal structure. It simplifies the code by enabling access to elements sequentially without needing to understand the underlying representation. However, its disadvantages include added complexity, as it requires the implementation of additional classes or interfaces, and potential performance overhead due to the extra layer of abstraction, which may not be ideal for simple collections.