A mount point is a directory in a file system where additional file systems can be attached or "mounted." This allows users to access files and directories from different storage devices or partitions as if they were part of the main file system. For example, when a USB drive is connected to a computer, it is often mounted at a specific mount point, allowing users to access its contents. In operating systems like Linux and Windows, mount points are essential for organizing and managing data. They help the system recognize and integrate various storage locations, such as hard drives, SSDs, or network drives, into a unified file structure.