Jitsi is an open-source video conferencing platform that allows users to communicate via audio and video over the internet. It is designed to be secure, scalable, and easy to use, making it a popular choice for online meetings and video calls. Jitsi is written in Java and uses the WebRTC standard for real-time communication, allowing it to work seamlessly on most modern web browsers without the need for any additional plugins or software. It also offers a range of features such as screen sharing, recording, and support for multiple participants, making it a versatile tool for both personal and professional use.