JQuery Mobile is a framework for building mobile web applications using minimal code. It is built on top of jQuery and jQuery UI, leveraging their JavaScript libraries and CSS frameworks. JQuery Mobile provides a range of UI elements, widgets, page transitions, themes, and events for developing mobile apps that work across various mobile platforms and devices. It allows creating basic single page apps with HTML5 markup and managing page navigation. The framework also supports server communication through AJAX and provides mobile events for touch interactions.