If you continue to scroll down under Storage, you'll see a list of all your apps, in order of how much space they consume. Select any app, and a new page shows the usage in tw… See more

Delete Them
On that device storage page, look for apps you don't use. Tap them and select Delete App. Any purchased app is always available t… See more

The Photos app often takes up a lot more space than people realize, so let's deal with that app directly. Under Settings > General > [device] Storage, find Photos to see how much stora… See more

Multimedia, such as audio tracks and videos, takes up a lot of space. There are two ways to delete audio files and videos in Apple's own Music app/service. See more