You can enter a view (profile) id directly, or click the cell reference button and select a cell in the workbook to get the value from. View ID’s are the numbers displayed in the View (profile) selector. e.g. 76063423.
[Pro version: you can also enter an Analytics Edge [range] reference (Core Add-in required) to a column of view id values, and the connector will query multiple views and deliver the results in a single response, prefixed by a View ID and View Name column.]