iphone 4 ios 4.3 update to ios 6, save media content while updating?

I realize that I can backup my iPhone and then restore, but does it save my apps? On the apple website it says: "Back up key elements of your device, such as settings, Contacts, Calendars, Notes, and your Camera Roll1. iTunes will not, however, back up media content from your iOS device, such as music, apps, books, movies, and TV shows." What should I do?