Tumblr is a microblogging platform and social networking website allowing users to post multimedia and other content to a short-form blog. Its users also have the ability to follow other users’ blogs, as well as make their blogs private. Much of the Tumblr’s features are accessed from the dashboard interface, where the option to post contentand posts of followed blogs appear.
Founded by David Karp in 2007, Tumblr is headquartered in New York.

#1 On May 20, 2013, it was announced that Yahoo and Tumblr had reached an agreement for Yahoo! Inc. to acquire Tumblr for $1.1 billion.

#2 In July 2013, Tumblr began to filter content in adult-tagged blogs from appearing in search results and tagged displays unless the user was logged in. In February 2018, Safe Mode (which filters “sensitive” content and blogs) became enabled by default for all users on an opt-out basis

#3 As of September 2021, Tumblr hosts more than 533 million blogs.