Meetup is a platform that enables users to create and join groups for a wide range of activities and events. Users can log in using their email, Facebook, Google, or Apple accounts. Meetup offers features such as creating a personal account, discovering groups, browsing calendars, exploring topics, finding local guides, making friends, and accessing help and support. Meetup also provides options for businesses and organizations to become affiliates and offers a blog, podcast, and career opportunities.