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Keep in mind that some formats, such as WAV files, do not provide any fields to store tag information in this case the information for these files will only be stored within the iTunes database and this information will not be available when importing these files into another iTunes library or another application. This means that if you reimport these files into another iTunes library or another media management application that reads tag information, any changes you’ve made will be reflected there as well. When you make a change to the tag information in iTunes, this information is updated both in the iTunes database and in the file. Note that tag information is stored both in the iTunes library database and within your actual media files, providing the file format supports tag information. Further, even with your purchased and CD-imported content, you may not like the way the information is filled in and may prefer to customize it to your own liking. On the other hand, media content that you import from other sources may not be filled in completely or properly. Tracks you purchase from the iTunes Store and other online stores and tracks that you import from your own CDs will normally include at least basic tag information. Of course, for this to work properly, the necessary tag information needs to have been filled in. This also applies to how your music and other content is organized on Apple’s media devices: the iPod, iPhone, iPad and the Apple TV. This has the advantage of allowing you to quickly locate and browse through your media content in a number of different ways, rather than being limited to the relatively rigid hierarchy of a file and folder structure. When you import media into your library, iTunes reads these tags and copies that information into its own database for faster access. Tags are stored in your media files and contain information such as title, artist, album and genre this provides more data than can easily be stored in a file and folder structure and since the information is contained in the files it remains available regardless of what you name the file or where you move it to. ITunes uses a tag-based approach to organizing your media content rather than relying on your file and folder organization. Syncing Playlists to your iPod, iPhone or iPad.Syncing Album Artwork to your iPod, iPhone or iPad.Viewing and Browsing your iTunes Library.