What is REST API ?
A RESTful API is an application program interface (API) that uses HTTP requests to GET, PUT, POST and DELETE data.
Knowing Node JS well will get you a job or improve your current one by enabling you to build high quality, robust web applications.
The best way to learn Node is by building Node apps.
According to the 2018 Stack Overflow Survey, Node is in the top ten for back-end popularity and back-end salary