Mounting a filesystem simply means making the particular filesystem accessible at a certain point in the Linux directory tree. When mounting a filesystem it does not matter if the filesystem is a hard disk partition, CD-ROM, floppy, or USB storage device.

What does it mean to mount a partition?

Before your computer can use any kind of storage device (such as a hard drive, CD-ROM, or network share), you or your operating system must make it accessible through the computer’s file system. This process is called mounting. You can only access files on mounted media.

What is Mount point in Linux partition?

A mount point is simply a directory, like any other, that is created as part of the root filesystem. So, for example, the home filesystem is mounted on the directory /home. Filesystems can be mounted at mount points on other non-root filesystems but this is less common.