The MTP (Media Transfer Protocol) driver is a software component that allows a Windows computer to communicate with and transfer media (photos, videos, music, etc.) between a Windows PC and portable devices like smartphones, digital cameras, and other media players that support MTP. MTP enables a device to be recognized by your PC as a media device rather than a storage device, allowing for easier management of media files on the device without exposing the entire file system.

For example, when you connect an Android phone or a Windows phone to your computer via USB, MTP enables your computer to access the device's media (music, photos, videos) without having to browse through the internal file structure like a standard USB storage device.