Tumblr is a microblogging platform and social networking website. David Karp is the Founder, and CEO of Tumblr, Inc. He founded the company in April 27, 2007. Since then, Tumblr grows rapidly and it is occupying position 39th on Alexa ranking chart as of March 2012. Tumblr provides a space named “tumblelog” for users to post multimedia and other content. The owners of the tumblelogs can make their blog private or let other users to follow them. Many of Tumblr features utilize the “dashboard” interface, where users can choose option to post content and post or follow other users’ blogs. Tumblr is one of the well-known social networking services, and users can utilize its feature to expand networking and interact with other user.