Meetup is a platform that connects people with similar interests and allows them to create and join groups for various 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 and events, accessing a calendar, and connecting with local guides. The platform also provides resources such as a blog, podcast, and career opportunities. Meetup aims to help people make friends, explore new topics, and build communities.