How can I include a cell reference and have it evaluated inside the argument of a Google Sheets function? For example:
=COUNTIFS(Sheet1!E:E,"\*D1\*")
In the above example, I want D1 to be replaced with the value of that cell so that the function becomes something like
=COUNTIFS(Sheet1!E:E,"\*blabla\*")
If D1 contains "blabla".