Excel Marco error

I have a Excel Marco and when I run, it show :
Run-Time error “1004”
Application-defined or object-defined error.

When run debug:
It show error at : ActiveCell.Offset(1, 0).Select

What does it mean?

Here part of the code:
counter = 0
Do While ActiveCell <> “Standard Deviations”
counter = counter + 1
ActiveCell.Offset(1, 0).Select
Nana = counter – 1
Loop