Period comparison helps you to analyse the evolution of a metric for a given period of time. It compare the select date range to a previous symmetrical period.
When activated, the period comparison displays how your metrics evolved in 2 different ways :
In the metric: the evolution in percentage between the current date range and the previous period
On the graphic: a lighter curve representing the previous period
The feature is available up to a 3-month date range.
It is available on the bottom of the date range toggle in the top right:
