Mount is the process of connecting any volume to operating system. After this, operating system, any application or user can access contents of the volume through standard way. For Windows this standard way means the volume is assigned with drive letter, for Linux it means the volume becomes available under one of its tree node.
To mount any volume you should use the mount command - "mount
The fstab (file systems table) file is commonly found on Unix and Unix-like systems and is part of the system configuration. The fstab file typically lists all used disks and disk partitions, and indicates how they are to be used or otherwise integrated into the overall system's file system. It also allows automatically mounting specified file systems at startup.
Generally, the fstab is only read by programs, and not written; it is the duty of the system administrator to create and maintain this file properly. However, more modern system administration tools can automatically build and edit fstab, or act as graphical editors for fstab.