Here you can see your strongest and weakest days of each week (and of course special days like Black Friday or Cyber Monday). Knowing which days will bring strong sales and which bring weak sales ahead of time will allow you to plan your campaigns accordingly.
Whether you want to run campaigns on your strongest or weakest days, is up to you.
The information displayed in the Special Days section updates weekly.
In the dashboard (which you can view right here>>) you see information for the week, indicated in the designated time-period field, including which products and how many units of each will be sold, on the week’s strongest and weakest days.