In the last few years we have suddenly found ourselves in an unprecedented situation where face to face conversations are now a luxury, replaced by the tap of a button. We find ourselves using realtime audio and video communication in almost all applications in life, right from remote work to virtually visiting the doctor. But what happens after the tap of the button on your screen on your computer? Let's dive deep into how realtime communication works, what APIs are called in order to establish connection between two devices and what protocols are used. In this talk I will be covering the basics of WebRTC, signaling protocols, peer to peer connections and data channels.