Finder is the default file management application in macOS, the operating system for Apple computers. It allows users to navigate through their files and folders, providing a graphical interface to organize, access, and manage data stored on their devices. Users can open, move, copy, and delete files easily using Finder. In addition to file management, Finder offers features like the ability to create new folders, search for files, and view items in different formats, such as icons or lists. It also integrates with other macOS applications, making it a central hub for managing content on a Mac.