learning Excel VBA. Query on syntax for range function

Hi. i have seen a couple of examples on how to define range/ cells.

There is a particular one which i am curious about

Range(counter & ":" & counter).Value


counter defines an integer variable.
does the above statement means selecting the entire row, of which counter specifies?

for the e.g. entire row 1 etc.



Also, typical examples shows the defining of range as Range("A1:B3"). The entire range is in quotes. Why is it that for the first example, only the colon is in quotes?



Thank you