If you ask about the Tags column content like this
This is showing what exactly was read from your track.
It depends on the settings I mentionend above.
For example: If you read APE tags (according to the Read-Section in File -> Options -> Tags -> Mpeg) and such APE tags exists in your track, it will be indicated in the Tags column.
The same is true for ID3v1 and ID3v2.3, ID3v2.4.
If you see for example
APEv2 (ID3v1 ID3v2.3 APEv2)
it tells you, that what you currently see on the left side in the Tag Panel is the content of APEv2.
It also indicates that there is more content in the formats listed in brackets.
If you see Lyrics3v2, then Mp3tag informs you, that this tag type is also included in your track.
Mp3tag currently does NOT SUPPORT this kind of lyrics, only UNSYNCEDLYRICS.
There are several existing topics about how to remove Lyrics3v2, including this one:
and this one:
I have no idea, because I don't know what other software you use - in addition to MediaMonkey and Mp3tag.