Windows Explorer allows users to organize and manage files and folders on a computer. It displays files in a hierarchical structure with drives at the top containing folders, which then contain files. Drives are the largest storage areas, usually the hard drive or other external drives, while folders are used to organize files. Files contain data like documents, pictures, audio and video. Windows Explorer provides different views to display files as icons, lists, or details and allows sorting files by name or other properties. It is used to navigate folders, view file contents and properties, and perform actions like copying, moving and deleting files.