IPHONE Why don't downloaded apps appear on my home screen?

I DL THEM AND THEN I CAN't FIND THEM UNLESS I GOTO APP STORE TO OPEN THEM Help ON HOW TO Put them on home sorry for capslock lol

1.) Your issue could be because all the home screens are filled with apps, so new apps have no where to go. If this is your problem:
Swipe from left to right and type the name of the app you are missing in the search box to see if the app is installed on your iPhone. If you see it there and not on the home screens then you may have reached the home screen limit. Try putting some apps in folders to free up space. New purchases will not go into folders automatically so you will need to free up space if you want to see them on the screen without having to search every time. After placing some apps in folders, reboot the iPhone and you should see the apps somewhere on one of the home screens.

2.) Check settings; make sure nothing is set for age restrictions.

3.) Is your phone jailbroke? If so, do some research on that, as this could be the cause of the problem.