Notifications alert you to the arrival of new messages, calendar events, and alarms, as well as ongoing events, such as downloads
Your ringtone lets you know incoming calls, and can be personalized to your liking.
You can even set ringtones for specific contacts so you always know who is trying to reach you!
If you want to personalize your ringtones even more, always keep in mind you can find
3rd party apps that can customize this further! (Check out apps like Zedge to really customize all your tones, wallpapers, and even games!)