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Hubs are an experience unique to Windows Phone and organize various applications into consolidated groups of information. The user-interface experience presented by the Windows Phone hubs is “distinctly Metro” and uses the Panorama control to its fullest. One hub typically contains several logical application “layers” that are related. For instance, the Music + Videos hub has songs, playlists, a music marketplace, and other related applications. Some hubs, such as the Music + Videos and Pictures hubs, offer integration points, which allow your own applications to easily become part of the hub. Others, such as the Office, Marketplace, and People hubs, provide no integration, whereas some, like the Games hub, allow integration only after an approval process has been completed.