FileList is a data structure used in programming to store a collection of files. It allows users to manage and organize files efficiently, making it easier to access and manipulate them. Each entry in a FileList typically includes information such as the file name, size, and type. In many programming languages, FileList is often used in conjunction with file upload features in web applications. When users select multiple files to upload, the FileList object captures these selections, enabling developers to process and handle the files as needed.