How do you compare year on year?

This is possible in both the Reporting UI and the Advanced Analysis UI – for some reason they are slightly different. It’s still a little manual rather than being a preset that you can select.

First open up the date range picker.

Next select the Compare Toggle below the date range options.

By default it will set your comparison period to the previous period. From here you need to manually find the same date range for the year before.