A real-time chat application is a software tool that allows users to communicate instantly over the internet. These applications enable text, voice, and video messaging, making it easy for people to connect regardless of their location. Popular examples include WhatsApp, Slack, and Facebook Messenger. These applications use various technologies, such as WebSockets and APIs, to ensure messages are delivered immediately. Users can create group chats, share files, and even send emojis, enhancing the communication experience. Real-time chat applications are widely used in both personal and professional settings for efficient collaboration and social interaction.