A jQuery Plugin Creation developer designs and develops reusable pieces of code known as plugins, using the jQuery library. These plugins add extra functionality to web pages, enhancing user experience. The developer's tasks include understanding requirements, writing efficient and scalable code, testing for bugs, and optimizing for performance. They ensure the plugin is compatible with various browsers and devices. They also provide clear documentation and usage examples for other developers. Their work involves problem-solving, creativity, and a deep understanding of JavaScript, jQuery, HTML, and CSS. They also need to keep up-to-date with latest web technologies and trends.