GreasyFork is a website that hosts user-created scripts designed to enhance the functionality of web pages. These scripts are typically written in JavaScript and can modify the appearance or behavior of websites, making them more user-friendly or adding new features. Users can browse, search, and install scripts from GreasyFork easily. The platform allows developers to share their creations with the community, and users can leave feedback or report issues. It serves as a valuable resource for those looking to customize their online experience.