If you’ve got an iPhone 6s or later model, there are actually a lot of neat little tricks hidden behind 3D Touch gestures. While you probably already know that 3D Touching on a normal app icon will show a menu of actions for many apps, sometimes along with a widget in iOS 10, there’s actually a useful 3D Touch feature for folders as well.
Although in most cases, 3D Touching on a folder will just give you a “Rename” option, if you have one or more apps in a folder that are showing a notification, you’ll also see a list of those apps, providing you with quick shortcuts to go right into them to deal with the notifications. This can be especially useful if you have a folder with a lot of apps, as it’s much faster than swiping across multiple pages to try and figure out which icons are showing notification badges.
