What is JavaScript? JavaScript is a versatile programming language primarily used for web development. It enables you to create interactive web pages. How does it work? JavaScript runs in the browser, allowing you to manipulate HTML and CSS. Why is learning JavaScript important? It's essential for modern web development and a valuable skill for any programmer. To begin, familiarize yourself with basic concepts like variables, data types, and functions. You can use resources like free online tutorials and beginner courses to kickstart your learning.