The best part about Socket.Io was its ease of setup with Node.js. Community support is also excellent. Amount of features it adds to the WebSocket API are really great. I use it every time there is a project that handles data in real-time.

The way socket.io handles bidirectional communication between clients and servers makes it an ideal application for interview platforms, live chats , docs like google doc

Socket.io is very easy to use simply we can integrate it with our javascript code .It make easy to perform bidirectional communication bw server and web clients.Cross browser compatibity is also best thing in socket.io . As it has large no. of user there has good customer support.