There are actually a few different ways to uninstall iPod touch apps. When you delete apps, you free up space on your device and make room on your home screen for more apps. Before you delete the app, consider organizing your apps into folders if you just need to declutter your screen.
The directions on this page should work for all versions of the iPod touch, regardless of the model or iOS version.
The easiest way to delete apps on the iPod touch is to do it directly on the device. This process is similar to how you rearrange apps on the home screen or create folders.