A foundation and metal bed frame is a simple bed set that consists of a metal platform (either fixed or adjustable) on which your mattress rests. This type of bed is typically more affordable than other types, and often comes with extra storage space above the bed. It's also a good option if you have a variety of mattress types as it works well with most models. If you're looking for a stylish contemporary look, consider investing in a platform bed equipped with a wooden or metal frame.