# Free YouTube Series
We use a lot of RESTful APIs - wouldn’t it be great to know how to build one? Let’s do just that with Node.js, one of the most popular server-side languages.
3) Adding More Routes to the API
4) Handling Errors & Improving the Project Setup
5) Parsing the Body & Handling CORS
7) Managing Orders with Mongoose
9) Populating Queries with Mongoose