If you download a lot of apps from the Windows 8 Store, install your own programs, and pin those programs to the Metro Start screen, the screen can become a mess. However, you can group tiles on the Metro Start screen and label those groups.
After installing software, here’s what our Metro screen looks like. It’s a jumble of programs, and as we install more programs, it’ll only get worse. The tiles seem to be in two groups, but not necessarily how we would organize them.