You haven't said anything about what you are trying to link to what.
If you have two worksheets in one workbook, Sheet1 and Sheet2:
If you have "Help" in cell A1 on Sheet2
and then put this formula in cell A1 on Sheet1,
Cell A1 on sheet 1 will show "Help"
There is now a link between the worksheets.
Change the word Help in cell A1 on Sheet2 to the number 911 and cell A1 on Sheet 1 will show 911
or are you trying to do something entirely different!