Reddit is a vast online platform and social news aggregation site founded in 2005 by Steve Huffman and Alexis Ohanian. It functions as a collection of user-generated communities known as subreddits, each dedicated to specific topics ranging from news and science to hobbies and memes. Users, called redditors, can post text, images, links, or videos, and engage through comments, upvotes, and downvotes that determine content visibility. The site's algorithm promotes popular posts to the front page, fostering discussions and viral trends. With millions of daily users, Reddit serves as a hub for information sharing, entertainment, and community building, often influencing internet culture and real-world events. It emphasizes anonymity, with accounts not requiring real names, and operates on a karma system that rewards quality contributions. Despite its popularity, Reddit has faced controversies over moderation, misinformation, and toxic communities, leading to ongoing efforts to improve policies and user experience.