Shortcuts Keys are the combinations of two and more keys pressed in sequence to perform special task which generally required mouse and trackpad and other input devices. It makes your work faster and improve work and productivity.
Cut the selected item and copy it to the Clipboard.
Command-C
Copy the selected item to the Clipboard. This also works for files in the Finder.
Command-V
Paste the contents of the Clipboard into the current document or app. This also works for files in the Finder.
Command-Z
Undo the previous command. You can then press Shift-Command-Z to Redo, reversing the undo command. In some apps, you can undo and redo multiple commands.
Command-A
Select All items.
Command-F
Find items in a document or open a Find window.
Command-P
Print the current document.
Command-S
Save the current document.
Command-Tab
Switch to the next most recently used app among your open apps.
Shift-Command-5
In macOSMojave or later, take a screenshot or make a screen recording. Or use Or use Shift-Command-3 or Shift-Command-4 for screenshots.
Control-Command-Q
Immediately lock your screen.
information source https://support.apple.com/en-in/HT201236
