Places whatever has been 'cut' or 'copied' to the clipboard into it's new destination. In Excel if you have copied a range, say A1:A100 and you want to paste it to B1:B100 you are best to simply select the top left cell and select 'paste'.  In this case B1.  This is because Excel will error if the 'shape' for the 'destination' range is not exactly the same as the 'source' range. Selecting a single cell lets Excel work it out for itself. Beware however that you do not inadvertently paste over other valuable data, although generally again, Excel will warn you before doing this.