It has always been a challenge for me to compare metrics over time in an efficient manner. For example, MoM, YoY, WoW, etc. I am typically relegated to multiple dashboard widgets or ugly looking reports.
I love the ability in Ad Hoc Analysis to create 'Derived Metrics' and am excited for this capability to come to Reports & Analytics. It would be really nice to be able to create segments and derived metrics based on dynamic time values.
For example. If I am looking at last months visits (a complete month), I might want to compare MoM or YoY Metrics in table. It would be nice to create the following Derived Metric
Name: YoY Visits %
Calculated Metric: (Visits (previous month) - Visits (current month)) / Visits (current month)
Type: %
The trick here is that the segment for previous month would update based on the date selected in the report. You could obviously do prior week, prior 30 days, etc.
Michael