WebRTC stands for Web Real-Time Communication. It is an open standard that enables live video transmission directly via the browser. The advantage: customers do not need any extra applications or browser plug-ins for video conferencing, audio transmission, chats or screen sharing.
Twilio is a cloud communication platform and a kind of toolbox for WebRTC and simplifies the development of solutions based on this standard. The service provides convenience functions via Cloud APIs, such as call routing via STUN. Twilio thus works in the background and – to put it simply – establishes the connection to WebRTC.