The site is composed of hundreds of sub-communities, known as "subreddits." Each subreddit has a specific topic such as technology, politics or music. Reddit site members, also known as, "redditors," submit content which is then voted upon by other members. The goal is to send well-regarded stories to the top of the site's main thread page.
Reddit member registration is free and is required to use the website's basic features. For a monthly fee or yearly subscription, redditors can upgrade to Reddit Gold. This service provides a set of extended features not available to non-paying users. Features of Reddit Gold include access to members-only communities and the ability to turn off sidebar ads.
Reddit is similar to Digg, another user-generated social networking site. Steve Huffman and Alexis Ohanian started Reddit in 2005 and Condé Nast Publications acquired the site in October 2006. Reddit split from Condé Nast in 2011 and now operates under Advance Publications. A July 8, 2012, NYMAG.com article reported that 35 million new users sign up for Reddit every month. President Barack Obama made news by participating in an "ask me anything" Reddit session with readers on Aug. 29, 2012.