I am new to Linux...i am getting the meaning of "mount"
and why we need mounting ??

Lots of Linux Distribution beside being used as desktop computers are also use as web server, media file server, whatever else server. So servers are running without graphical interface. so if you are the system admin in a network with different server and you wish to mount a remote machine to the server you use the command mount for it.

so what you need to do is ssh into your server and then run the mount command from there using whatever arguments and prefix to best suit you.

Also if you attach a device to your computer and you wish to have full control over its contents you better use the mount command instead of just plug it on the usb driver with out knowing where the system is mounting your device.

open up a terminal and type 'man mount' for more information

"mounting" is a foreign concept to Windows users, since Windows auto-mounts anything it touches. Some Linux distros will auto-mount attached hard drives, but not all.

Essentially, "mounting" is a way to make some kind of device (attached drive, network share, iso file, etc) readable on your local filesystem, so that you can interact with the files on the device.

My understanding is that the term "mount" comes from the early days of computers when large reels of magnetic tape would have to lifted from the floor and placed on spindles (hence, "mounted"), then threaded through tape heads a take-up reel to be read and made accessible to the computer.

Since then, it has taken on a more general meaning of making a partition accessible for reading and writing data, whether the partition is on a hard drive, USB stick or drive, telephone, or other external device, or even on a remote computer via the network, analogous to how "xerox" has come to mean any copier.

In the early days of disks, many if not most hard drives used removable disk packs, and often due to small capacity disks had to be swapped for different software applications. That process required an operator to unmount the disk from the computer software, spin down the drive and remove the current disk pack, insert the desired disk pack, spin the drive back up then when the disk came ready (sometimes a matter of minutes, not seconds), the operator could re-mount the disk so the computer was again aware of the contents.

This was a common daily procedure on many of the DEC systems I serviced in the 70's, many running Unix. DEC's operating systems had equivalent mount commands.