Explanations for Settings Menu Options

Tapping my way through the Iphone menus is like roaming aimlessly through a labyrinth. Does Apple have a site where users can view the Iphone menu choices that fall under the Settings App and read an explanation of what the options mean and do? It would be nice if you had such a site that allowed a user to mimic the path of choices they did on their Iphone (navigating the same way) and see explanations of what the features do. Thank you.