What is the keyboard shortcut ctrl z used for

Undo <= Is the answer... or yeah it is the answer

Ctrl z is typically used to undo the last thing you typed / did
Ctrl y is generally the opposite, used to redo things that have been undone
Final
Ctrl z is undo.
Hope I helped :)

Answerpage pane; i believe this is a correct answer/ plz check first/// good luck;