I signed up for Google Analytics on my site and the procedure and labeling has changed a bit since I last did it.
I turned on the GA plugin that come bundled with X and then made my way through the “adding new property” section of the GA page.
Then I plugged my “Measurement Id” in to the section in the plug in that asks for “Google Analytics ID” They labeled 2 different things, so I’m not sure if I’ve done it right (please see screen capture)

