Musicbrainz Tags Supported

With the latest release, the server has a new feature “Support for Musicbrainz release type embedded tags (#13593)”

Could someone elaborate on this? Is this just an added support for an extra tag named “release type”?
Also, does anyone have a full list of tags that are supported for import into Plex?

Server Version#: 1.27.2.5929

See this discussion, Plex Media Server 1.27.2.5929 - support for release type embedded tags - #12 by MovieFan.Plex.