All you need is a webcam (a low cost device that provides real time video & audio to a PC or computer network), a web browser and an Internet connection.
Webcams are considered to be the most popular form of videotelephony, making them perfect low cost and flexible devices for using with many software clients to provide video calls & videoconferencing, chat room being the general term to describe any form of the latter, both synchronous and asynchronous.
Chat room can be used as a technology for information sharing online through text with other users.
It’s a term with a broader meaning, because, unlike instant messaging programs, which are intended for one-to-one communication, it enables or makes it possible for multiple users to take part in the same conversation, typically known as videocalling or videoconferencing.
A web chat is a special system or service that allows real time communication for users that use easy-to-access web interfaces.
It’s an internet online chat type that is user-friendly and fully accessible by users, without need to install any specialized software for chatting.