The technology used to make web pages interactive and dynamic includes JavaScript, alongside HTML and CSS. JavaScript enhances user experience by enabling dynamic content updates without requiring a full page reload, allowing for features like animations, data submission forms, and interactive elements such as sliders or pop-ups. Frameworks and libraries such as React and jQuery extend JavaScript’s capabilities, streamlining development. Together, these technologies create visually appealing and engaging user interfaces that improve interaction and the overall user experience on the web.