What is Photoshop Masking and why use masking in Photoshop

What is Photoshop Masking:
In photoshop image masking is the process of removing background of an image which have blurred portion or which have hair portion. Masking of an image is not an easy task.When there is no hair or fur portion in a image then it is not so difficult to remove background, this can be done by simply using pen tool in photoshop.