Most of the time, when you shop for digital goodies for scrapbooking (or other graphic projects), you will download a file that is ending with a .zip extension. This is meant to take less space on your hard drive, and with a smaller file size, it will use less bandwidth, and will take less time to download. This can be especially important if you have a low speed connection, or a bandwidth cap. A zip file can't be used as is, and has to be "unzipped".