Reddit is an American social news aggregation, web content rating, and discussion website where 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. Posts are organized by subject into user-created boards called "subreddits", which cover a variety of topics like news, science, movies, video games, music, books, fitness, food, and image-sharing. The site is known for its open nature and diverse user community that generates its content.