Node.js is the google built in chrome platform that facilitates the request of client to servers simultaneously. As I draw in the red color above, with other scripting languages, if unless one client request is not fulfilled, another client computer's request is not even accepted but with node.js, another client request , may it be for form handling (form handling is user entries form and submits) , is also accepted (that is what is asynchronous programming). As a result, response to client's action in server's computer becomes fast.
Node.js also provides API (API facilitates that you can use ready made modules directly to your source code) to connect with and add, edit, delete on databases be it Microsoft Access, MySQL, SQL databases. You do not need to write from scratch code for that.
Before I end this post, below are screenshots of what importing modules (modules are functions which would be used repeatedly in program) is (first line), and what importing custom written(by yourself) modules look like.
