Summary: Before you download iOS 11, you should make sure all the apps you rely on will work with the newest version of the operating system. With iOS 11 Apple will no longer be offering support for 32-bit apps. Instead, everything that runs on iOS devices will need to have been updated to a 64-bit version. On a super basic level, 64-bit apps are going to run much faster than a 32-bit version and take advantage of the current hardware in the iPhone.
