Reddit is an American social news aggregation, web content rating, and discussion website. Registered members submit content to the site such as links, text posts, images, and videos, which are then voted up or down by other members.

Reddit was founded by University of Virginia roommates Steve Huffman and Alexis Ohanian, with Aaron Swartz, in 2005. Condé Nast Publications acquired the site in October 2006. In 2011, Reddit became an independent subsidiary of Condé Nast's parent company, Advance Publications.

Posts are organized by subject into user-created boards called "communities" or "subreddits", which cover topics such as news, politics, religion, science, movies, video games, music, books, sports, fitness, cooking, pets, and image-sharing. Submissions with more upvotes appear towards the top of their subreddit and, if they receive enough upvotes, ultimately on the sites front page. Although there are strict rules prohibiting harassment, it still occurs, and Reddit administrators moderate the communities and close or restrict them on occasion. Moderation is also conducted by community-specific moderators, who are not considered Reddit employees.

The website is known for its open nature and diverse user community that generate its content. Its demographics allow for wide-ranging subject areas, as well as the ability for smaller subreddits serving more niche purposes. The possibilities that subreddits provide create new opportunities for raising attention and fostering discussion across various areas. In gaining popularity in terms of unique users per day, Reddit has been a platform to raise publicity for a number of causes. Additionally, the user base of Reddit has given birth to other websites, including image sharing community and image host Imgur, which started in 2009 as a gift to Reddit's community. In its first five months, it jumped from a thousand hits per day to a million total page views.

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