The term keyboard shortcut generally refers to a keystroke or combination of keystrokes used to select a command instead of choosing the command from a menu with the mouse.
Music and audio programs commonly add shortcuts for functions that are specific to studio-related activities, such as zooming in or out on a track or waveform display, jumping to the start or end of a region or session, and operating the transport controls.
Manufacturer-defined shortcuts are usually shown next to the corresponding menu commands, but sometimes they don't appear anywhere — even in the documentation.