If you are starting working on React then you need to configure most of the things like Webpack to bundle your project, Babel to compile JSX to browser ready code etc. It takes more time to configure a project from scratch. This configuration may give the beginners a headache.
Seeing these problems, The Facebook has officially given a tool for React developers in mid of 2016 known as Create React App. CRA(Create React App) is a CLI which helps developers to start their project immediately. It is also very helpful for the beginners.