But, unlike traditional programs, apps downloaded from the App Store aren’t run on your computer; they only work on devices running the iOS, such as the iPod touch. Which leads to the question: how do you sync apps to the iPod touch?
The first step in getting apps onto your touch is to find the app you want to use. To do this, you need to use the App Store, which is a section of the iTunes Store (or a standalone app on your touch). To go there, launch the iTunes program on your computer and click on the App Store tab or tap on the App Store app on your iOS device.
Once you're there, search or browse for the app you want.