Click cell:
It makes cell action.
Enter:
It Moves the active cell Down.
(Shift+Enter):
It moves the active cell on cell up moves the active cell.
Tab:
Moves the active cell one cell up moves the active cell.
Arrow Keys:
Moves active cell left, right , up and down one row or coloumn.
Ctr+Shift+Arrow key(any):
Select the whole cell in the direction.