Power Automate Desktop allows users to build desktop automation flows using a visual designer. It can automate tasks across applications by recording mouse and keyboard actions. Some key uses of Power Automate Desktop include running commands from the command line, interacting with email via IMAP/Exchange, executing SQL statements, obtaining files from web pages, using the Windows File Explorer, and scripting in PowerShell. It supports both attended and unattended flows. The main components are the Console for managing flows and the Flow Designer for building them visually using a toolbar, actions pane, workspace, and variables.