The programming language commonly associated with web development is JavaScript. This versatile language helps create interactive, dynamic web pages and is integral for both front-end and back-end development. Coupled with HTML and CSS, JavaScript enables developers to enhance user experiences by manipulating Document Object Models (DOM) on the client side. Frameworks like React, Angular, and Vue.js further streamline development processes, allowing for the creation of complex applications efficiently. JavaScript's extensive ecosystem, with libraries and tools, empowers developers to build modern and responsive websites and applications.