We have learned how to develop an efficient, real-time web application using the Node.js and MongoDB API of Cosmos DB. We have learned about the requirement gathering, functional design, and various inputs of the system.

We have developed the complete application using Node.js and learned it step by step. At the end, we had a test drive to see if it works, which it did :)

In the next chapter, we are going to dive deeper into technical complexity and build a real-time email tracking system using Cosmos DB.