Reddit is a social networking and online content platform founded in 2005. Based in San Francisco, California, it allows users to submit content like text posts, links, and images. This content is then organized by topic-specific communities called "subreddits." Users can vote on the submitted content, influencing its visibility on the platform. Reddit fosters a strong sense of community and empowers users to curate content through upvoting and downvoting. It's known for its vast array of communities and its emphasis on user anonymity.