React is a JavaScript library, In other words, it’s a collection of code, and many developers have worked on it. React has an 87.49% satisfaction rating from the 17,000 users who used React globally. It allows developers to build user interfaces for websites and other applications like mobile apps, desktop apps, and Virtual Reality (VR) apps. So, whenever developers create any application, they have two parts the front-end and the back-end. The front-end is the interface with the user’s interaction, and the back-end is where all the logic is done. So simply front-end is the place with buttons, forms, and clickable options on which the app responds, and the back-end is where we store the data, user credentials, etc.