You can set start-stop times in the camera menu if you are using Auto. However, if you are using Premium Service, it's easier to set them in the app, which is shown here. However, the explanation is the same if you set the start-stop times in the camera menu.
Take photos only during on part of the day
This example shows a camera that is set to take pictures only between 9 PM and 6 AM. This camera is watching a camper at a camp. The owners don't want to get a bunch of pictures of them working around the camper while they are there, so they use this setting while they are at the camp, then turn start-stop times off when they leave so that the camera takes pictures 24 hours a day.
Take photos all 24 hours but use two different settings
This camera is set to take regular motion-triggered photos between 9 AM and 6 AM, then take time-lapse photos every 10 minutes between 6 AM and 9 AM. It will also take motion-triggered photos between 6 AM and 9 AM. You might use this to monitor a large food plot during early morning when deer may be moving in the food plot but far enough away that they don't trigger the camera.
Take photos during two different parts of the day but not during the rest of the 24 hours
This camera is set to take time lapse photos every 10 minutes between 5 AM and 9 AM and time lapse photos every 5 minutes between 4 PM and 6 PM. It will not take photos from 9 AM to 4 PM or from 6 PM until 5 AM. This example shows two different time lapse settings but you don't have to use time lapse. You may leave time lapse off, but have different trigger intervals or even use the same trigger intervals. You're just running the camera during two different parts of the 24 hours, regardless of the trigger and time lapse intervals.