JavaScript and HTML are fundamental technologies for web development. HTML (HyperText Markup Language) is responsible for structuring web content using elements such as headings, paragraphs, and images.

JavaScript is a programming language that enhances HTML by adding interactivity, dynamic content, and functionality. It enables developers to create responsive web pages by handling user input, modifying the DOM (Document Object Model), and integrating APIs.

Together, HTML and JavaScript form the foundation of modern web applications, allowing developers to build engaging and interactive websites.