Tumblr is a social networking website and microblogging platform where users can post blogs and images. Though originally created as a blogging platform, Tumblr has since evolved into a more general-purpose website for sharing thoughts, ideas, and images. Users can follow other users to receive updates about their blogs, or join conversations in the comments section. As of March 2016, Tumblr had approximately 290 million active users.
While some observers have argued that Tumblr does not meet the traditional criteria for a blog platform, others have argued that its hybrid nature makes it difficult to categorize. In general, however, most observers agree that Tumblr is a social networking website with a blog feature.