This screen shows all scheduled Reports Sets that you created. Data that is shown for each report set is the name, destination, last run time, frequency and scheduling date.
Column Last Run Time shows when was the Report set last sent, column Frequency shows how often will report be sent and column Scheduling date shows the exact date and time it will be sent.
Available actions on Scheduled Report screen are:
Create New Report Set
Access Schedule Options
Edit or Delete existing Report Set
Send Now chosen Report Set
You can read more here on how to use Scheduled Reports feature.