sentence: Users can follow other users, or choose to make their tumblelog private.
sentences_before: Tumblr' is a blogging site that began in New York City in 2007 by founder David Karp and Marco Arment. The site allows people to post text, images, videos, links, quotes and audio to their tumblelog, a short-form blog.
sentences_after: The service emphasizes ease of use.
concept_name: user
headings: Tumblr
categories: 2007 establishments New York City Websites