Reddit is an entertainment, social networking, and news website where registered community members can submit content, such as text posts or direct links, making it essentially an online bulletin board system. Registered users can then vote submissions up or down to organize the posts and determine their position on the site's pages. Content entries are organized by areas of interest called "subreddits". The subreddit topics include news, gaming, movies, music, books, fitness, food, and photosharing, among many others. As of 2015, web-site had 542 million monthly visitors (234 million unique users), ranking 14th most visited web-site in US and 36th in the world. Across 2015, Reddit saw 82.54 billion pageviews, 73.15 million submissions, 725.85 million comments, and 6.89 billion upvotes from its users.