Navigation with the Tab Keys
You may move left and right on a single row using the tab keys. Pressing the Tab key once will move you one cell to the right.
Original positon Tab once Tab againYou may move left one cell by depressing the Shift key and the Tab key at the same time. This action is often called a "Shift-Tab" action.
Original Position Shift-Tab once Shift-Tab againA logical question might be asked at this point....
"How is this different from using the left and right arrow keys?"
A great question! ...It isn't any different as far as the result. Some touch typing users find reaching for the tab key is quicker than reaching for the arrow keys. (We are not sure why, we only know the tab and shift-tab keys work and are only speculating why Excel offers two similar features.)