Firebase is useful here because you can use it to handle state changes for iceCandidates and not worry about using your own server. You can also store data with

Firebase is useful here because you can use it to handle state changes for iceCandidates and not worry about using your own server. You can also store data with Firebase API. By 'serverless', OP means that you don't need to have your own server/database and can host your app as a standalone html file, letting firebase take care of your backend.