Meetup is a platform that helps people discover and connect with others who share their interests, both online and in person. It has over 50 million members and enables users to find and join local and online events related to their interests, or to start their own groups and host events on topics they are passionate about. Meetup allows users to search for events by category or keyword, save events they are interested in, and connect with others through discussions and messaging. It is a useful tool for building a career network, discovering a tech community, creating a personal brand, and pursuing hobbies and passions.