Facebook chat is an instant chat messaging system by Facebook that you can use whenever you are connected to the Facebook website. Using the chat, you can talk to your friends in real time, either one-to-one or to a group of people in a group chat.
Facebook chat can be seen at the bottom right hand corner of the Facebook webpage. Clicking on it will show your friends that are online and available to converse with you. The chat system is also closely integrated with Facebook messages, and a private message can turn into a chatbox.
Facebook chat is also known as Facebook messenger on handheld devices, allowing users to talk with their friends on the go.