Drivers is an add-on that simplifies the process of creating and managing shape key drivers in Blender. It allows users to quickly link drivers to shape keys without needing to navigate complex menus. A shape key checking feature lets users view all shape keys on a selected object directly from the Drivers panel, which is particularly useful when working with armatures, as it removes the need to constantly switch selections between the armature and the mesh object. Users can assign objects or bones as drivers by setting transformation values, adjusting minimum and maximum limits, and clicking the assign button next to the desired shape key.