JavaScript is a programming language used to make web pages interactive. It’s one of the core technologies of the World Wide Web, alongside HTML and CSS.

Here’s a breakdown:

• Interactivity: JavaScript allows web pages to go beyond static content. It enables features like:

  • Dynamically updating content (e.g., live chat, news feeds) 
  • Responding to user interactions (e.g., button clicks, form submissions)
  • Creating animations and visual effects
  • Controlling multimedia (e.g., playing videos, adjusting audio)

• Client-Side Scripting: JavaScript code primarily runs directly in the user’s web browser, making it fast and responsive.

• Versatility: While primarily used for web development, JavaScript has expanded to other areas like:

  • Server-side development (Node.js)
  • Mobile app development (React Native)
  • Game development

In essence, JavaScript is a powerful language that adds life and interactivity to the web.