ReactJS is a simple javascript library, it is easy to learn and syntactically even normal developers who are having javascript knowledge and understand react.

Every DOM element in react is called a Component, In react we develop components those can be reused.

React loading engine is very quick enough to load the data on the page without reloading the whole page, it will automatically update the content on the page when there is data change.

It is easy to debug react components with the tools that exists in the market. We can use React Developer Tools and Redux Developer Tools to inspect the react components and debug it.

SEO is major problem for single page applications. But thanks to react, we can avoid SEO issues with this library, we can render react on server side.

We can develop native mobile apps in react using framework called React-Native(A framework for building native apps using React).