1) Social media debut of 2010 2) Tumblr competitor 
A pinboard-style photo-sharing website that allows registered users to create and manage theme-based image collections (called `boards”) such as events, interests, and hobbies. Users can `pin” content found around the web to a boards they’ve created.
Is a photo sharing site where users create themed image collections around events, interests or pastimes. Users can browse pinboards and add or `re-pin” images to their own pinboards, or `like” photos.