Add ID3 V2 Tags - Adds ID3 V2 tags, which are slightly different than V1 to the document.
Tag Using CD Remote Database - Uses song data stored in your CD Remote Database. You can change this database through most CD player programs like AppleCD Audio Player.
Query CDDB if Necessary - If your computer doesn't have any data for the CD you select, then when you click "Open CD," it will look up the data about the CD via the internet.
Auto Tag Completion - Automatically completes missing fields in the ID3 tag window.
Default Genre - You may use this to select the default music genre for the ID3 tag window.