Facebook was a huge hit when it was young, still you cant find anybody who is not on facebook you can share pics and videos and moments of your life.
Nothing is more better then pictures for shearing your happy moments and Instagram does that just perfectly.
The most intractive simple and cutest social network, we can share any picture, tag any friend and use soo many hashtags to make our picture reach millions of Instagram users.
Many people are running there buisness through instagram.
It is by far the most effective, inovative and creative app.
And it will go far.
Thank you