jQuery is a popular and widely used JavaScript library that simplifies the process of creating dynamic and interactive web pages. It provides a concise and efficient way to navigate and manipulate HTML documents, handle events, perform animations, make AJAX requests, and much more. With its easy-to-use syntax and extensive set of built-in functions, jQuery has become a go-to tool for developers seeking to enhance the functionality and user experience of their websites. It offers cross-browser compatibility, allowing developers to write code that works seamlessly across different browsers. jQuery's versatility and widespread adoption make it an essential resource for web development projects of all sizes.