Badges update automatically and link to the mod page on MineUniverse.
it basically just adds cool sword (and other weapon) swinging sounds that not many mods or texture packs (atleast for these versions) do.
I have not made the sounds, but they are royalty free.
sound links:
https://pixabay.com/sound-effects/slash-21834/
https://pixabay.com/sound-effects/swing-whoosh-5-198498/
https://pixabay.com/sound-effects/swing-whoosh-weapon-1-189819/
https://pixabay.com/sound-effects/item-swing-sfx-2-409076/
https://pixabay.com/sound-effects/film-special-effects-spear-thrust-3-382407/
https://pixabay.com/sound-effects/film-special-effects-spear-thrust-1-382402/
https://pixabay.com/sound-effects/film-special-effects-spear-thrust-2-382404/
(there is another sound but I can't find it anymore)