Tumblr, like many a burgeoning social network, is particularly popular among younger Internet users, according to Quantcast. In the U.S., the bulk (55%) of users are under 34 years old, and another 30% are aged between 35 and 49.
half of Tumblr’s daily posts are image-based.
Tumblr is better used to create awareness of a brand amongst a community that may not already be paying attention