Jabber is a messaging protocol that allows users to communicate in real-time over the internet. It is based on the Extensible Messaging and Presence Protocol (XMPP), which enables instant messaging, presence information, and contact list management. Jabber is widely used for both personal and professional communication, supporting text, voice, and video messaging. One of the key features of Jabber is its open-source nature, allowing developers to create various applications and services that utilize the protocol. This flexibility has led to a diverse ecosystem of clients and servers, making Jabber a popular choice for secure and decentralized communication among users worldwide.