Insert rows in excel

How to insert empty rows in excel based on condition.

Use the following activity -

If condition then
 insert row
End If

Karthik already mentioned you the best way if you just need add row in excel.
But if you are reading the data of the Excel in a datatable, then you can just Add Row to your Datatable based on your condition and write it back.

If condition Then
Add Data Row activity
End If