Some reports are able to have Saved Report Criteria. This is when you create a set of values that can be saved and later retrieved and used as the criteria to generate a report. If this feature is available for a report, the below button will show in the top toolbar.
Clicking this button will show the Saved Report list and editing screen for that report, e.g.
To apply saved criteria to a report, select the criteria from the list on the left and then click the "Select" button (at 1). This will populate the report criteria with the saved values. Then simply click the refresh button on the report.
Some reports allow you to schedule these saved criteria to automatically run on a regular basis. If this is available, the Frequency data will be displayed (at 2). Follow the directions here to set up automatic scheduling.