One of the primary advantages of Node is scaling. It can be a back end server, power the front end, or render the server side of a single-page application (SPA). Node can also be used as middleware to relay between front end and server-side processes, or to gather and integrate data from multiple APIs.
Node enables data streaming and chunking. This feature is especially useful when building real-time applications that stream media content or process large files for download. Streaming helps regulate traffic in just one file, while chunking uploads a large file in pieces and then stitches them back together. Both methods are less bandwidth intense for the end user. We are currently using Node.js to help clients enable user authentication and scale media streaming capacities.