Sometimes when you tap on a link on your iOS device, your handset bumps you from one app to another. Under these circumstances, iOS puts an interactive shortcut in the Status Bar known as Breadcrumbs so that you can return to the previous app, but Apple could have done so much better in this department.
If you’re in agreeance, then you might want to peek at a newly-released jailbreak tweak called AppCrumb by iOS developer sharedRoutine. It improves Apple’s Breadcrumb links by replacing the standard Status Bar shortcut with a more full-fledged windowed app experience.