Reddit has grown significantly since its founding in 2005 and now reaches over 330 million users per month who spend over 20 minutes per session viewing over 20 billion pages and 1 billion videos each month. The site reflects internet conversations and is organized by subreddits around different interests. Brands can engage communities by following discussions in relevant subreddits, utilizing the upvote/downvote system to understand what content is most popular, and hosting "Ask Me Anything" sessions to directly engage fans.