Looking for spikes. How to increase the effectiveness of your dashboard

Consider this:

A product manager asks an analyst: “Please make a dashboard where we can see Day 1, Day 3 and Day 7 retention rates in dynamics.”

“Are you sure?” the analyst asks. “These charts will be quite noisy. Just look how much the metrics alter from day to day. Maybe it’s a better idea to monitor the weekly retention rates instead. In this case, any random fluctuations will be smoothed out. ”