Easily learn and use
JavaScript's syntax was inspired by the Java programming language and is easy to learn and code. Developers use JavaScript in almost every website and mobile app for client-side scripting. Node.js has also gained significant popularity for backend coding in the last decade. Many major streaming and video platforms have been coded in Node.js.
Gain platform independence
Unlike with other programming languages, you can insert JavaScript into any webpage and use it with many other web development frameworks and languages. Once you have written it, you can run JavaScript code on any machine. Thus, JavaScript makes application development platform independent.
Reduce server load
You can use JavaScript to reduce server load and network congestion because it can run logical operations and do a lot of the server's work on the client itself. For example, consider the process of filling out a registration form. JavaScript quickly checks if you have entered a 10-digit number for the mobile phone field. If these requests were sent to the server, your page would reload for every error, making the registration process very slow and tedious.
Improve the user interface
JavaScript creates elegant websites that make it convenient to find and process complex information. Developers apply JavaScript to extend functionality and readability and to make website user interaction more efficient.
Support concurrency
JavaScript can run several different sets of instructions in parallel. On the backend, Node.js can handle and process highly scaled-up server responses without consuming the same amount of bandwidth.