Sometimes you get results from that do not really look nice like 3342.432423 but you would like it to look like $3342.43
Here comes the number formatting and Excel excels at it. Have a look at the example.
Again, try it by yourself. The formating can be even more specific and can be found under Format, Cells.
TIP: When you enter a lot of text, then you want sometimes that the cell automatically adapts to the text. This can be done by the WRAP function under Format, Cells and then Alignment. You can also Shrink the text or merge cells.... Try try try...