There are some cool features that you can enable if you access the hidden Developer Options menu! By going to Settings, then About Phone, then tapping on your Build Number 7 times, you can unlock the Developer Options menu!
In here you can do stuff like:
- Keep screen awake while charging
- Change animation length (Screen Transititons, or windows opening for example are all animated!)
- Modify the amount of apps that stay open in the background
and MANY more, but you probably won't need to touch any of them. These three are handy enough if you play a phone game or something and want the screen to stay on, or if you don't want animations taking up extra time.
Remember: If you don't know what it means, don't touch it! Go google it!