What is JavaScript?

JavaScript is a high-level, dynamic programming language commonly used in web development to create interactive effects within web browsers. It enables functionality such as form validation, dynamic content updates, animations, and interactive elements like buttons, sliders, and menus, making web pages more engaging and user-friendly.

It is important because it enhances the user experience by adding interactivity and responsiveness to websites. JavaScript is essential for modern web development, as it allows developers to create dynamic web pages that react to user input in real time without needing to reload the page, which improves website performance and overall user satisfaction.