Group chats are online conversations that involve multiple participants communicating in real-time. They can take place on various platforms, such as WhatsApp, Facebook Messenger, or Slack, allowing users to share messages, images, and videos. Group chats are often used for coordinating plans, discussing topics of interest, or simply staying in touch with friends and family. These chats can vary in size, from small groups of close friends to larger communities with hundreds of members. Participants can join or leave the chat at any time, and many platforms offer features like notifications, emojis, and file sharing to enhance the experience.