Bins are used to store parts when you don't need them on the workbench. The computer creates a MAIN bin automatically when you create a model file. Other bins can be created as needed to help you subdivide the parts you are working with. You can also rename any existing bins as needed to make sense to you. It is important to remember that a part exists either in the bin or on the workbench but cannot exist in both places at the same time. If you delete a part from the bin or the workbench, you are taking it completely out of the model file.
In Final Cut Pro, the window that contains your clips, transitions, effects, and generators. The bin lets you organize all of these elements, sort them, add comments, rename items, and so on.
A database in which master clips, subclips, effects, and sequences are organized for a project. Bins provide database functions to simplify organizing and manipulating material for digitizing and editing.