These are the official screenshots from the tool's site.
I personally don't use most of these things, but they're certainly good to have.
Columns Dialog page for customizing the file view
Options - Export Export configurations and settings
Options - Converter Powerful settings for converting filenames and tags
Options - Actions Case conversion and replacing within tags and filenames
Options - freedb Options for querying album information via the internet
Mp3tag main window Mp3tag main window with many enabled columns in file view
Mp3tag Export Mp3tag Export example
Mp3tag main window Mp3tag main window with enabled tag input fields
Options - General General options dialog page
Options - Playlist Playlist options dialog page
Options - ID3 ID3 options dialog page
A selection of awards Mp3tag has received:
Honlap készítés ingyen