Tumblr

Tumblr is a web publishing platform that allows users to effortlessly "post text, photos, quotes, links, music, and videos from your browser, phone, desktop, email or wherever you happen to be" . Founded in 2007, Tumblr was modelled after tumblelogs or short-form blogs. Users operate a rolling blog page that can be categorized as either open or private. Open Tumblr pages are searchable, followable, and rebloggable (a Tumblr user can repost your content on their own blog page) by the Tumblr community. The majority of Tumblr activities are managed through the blog page dashboard which allows users to view the live feed of recent blog posts from blogs they follow, comment or reblog content from blogs that appear on their dashboard, and to post original content. Tumblr relies on tags (#) to build connections between blog posts that address similar content or themes. As of December 1, 2014, Tumblr hosted over 213 million blogs.