What is the Run at Night Option in the Database Maintenance tool?

In the Database Maintenance Tool, I see an option for Run at Night, what does that do?

How to Use the Database Maintenance Tool

Answer:

Checking that option first, then clicking the button to copy live to demo means that that copy live to demo will run at 2:00 AM ET rather than immediately.

To run the copy live to demo task at night, you will first click the Run @ Night checkbox then click the button to Copy Live to demo.

When you do that, you will see a window appear asking if you want to run the task at night. Click Yes:

You will see that the copy live to demo task is scheduled to run at night: