Reddit, stylized as reddit, is a social news and entertainment website where registered users submit content in the form of either a link or a text ("self") post. Other users then vote the submission "up" or "down", which is used to rank the post and determine its position on the site's pages and front page. Reddit is based in San Francisco, California. Content entries are organised by areas of interest called "subreddits". "todayilearned' is a subreddit. Users submit interesting and specific facts that they just found out without looking it up.