Vital could mean something that is important or essential.
For example: the lungs and heart are both vital organs in the human body.
Social Networking website is a revolutionary idea with a very bright future with further scope for advancements. The opportunities provided from this medium are immense and many organisations are making use of this medium to better their practices. Organisations are no longer at the mercy of the media to advertise or convey their message. With the help of social networking they can advertise or communicate in a more efficient way.
