React allows you to build interactive components for your website or web applications using modern development concepts.

React is an open-source JavaScript library that specializes in building User Interfaces (UIs).

A UI is any element that allows users to interact through a browser on their device (laptop, tablet, smartphone, etc.). User interface is the primary point-of-contact between humans and modern computers.

An early version of React was created by Facebook engineer Jordan Wilke in 2011 to utilize modern development tools to create a more responsive UI.

React makes it simple and easy to build websites and apps, create UI test cases, reuse existing codes on website to its mobile counterpart, and improve UI and performance of web applications.

Examples of high-traffic websites that use React are Instagram, Uber, and Reddit. Their React developer are involved in the every stage of the application development to achieve responsive user interfaces that meet the needs of users into the future.