The "CanExecute" method is a part of the ICommand interface in WPF (Windows Presentation Foundation) and other frameworks. It determines whether a command can be executed based on the current state of the application. When the state changes, the method can be called to re-evaluate if the command should be enabled or disabled. When a command is executed, the CanExecute method is checked first. If it returns true, the command runs; if false, the command is disabled. This mechanism helps improve user experience by preventing actions that are not applicable at a given moment, ensuring that users only interact with available options.