What is the meaning of Revelation 14:3?

* The two F.O.G. Bibles & Commentary below are currently a work in progress.

And they sang a new song before the throne and before the four living creatures and the elders. And no one could learn the song except the 144,000 who had been redeemed from the earth.

Berean Standard Bible (BSB)

They sing a new song before the throne, and before the four living creatures and the elders. No one could learn the song except the one hundred forty-four thousand, those who had been redeemed out of the earth.

World English Bible (WEB)

And{G2532} they sung{G103}{(G5719)} as it were{G5613} a new{G2537} song{G5603} before{G1799} the throne{G2362}, and{G2532} before{G1799} the four{G5064} beasts{G2226}, and{G2532} the elders{G4245}: and{G2532} no man{G3762} could{G1410}{(G5711)} learn{G3129}{(G5629)} that song{G5603} but{G1508} the hundred{G1540} and forty{G5062} and four{G5064} thousand{G5505}, which{G3588} were redeemed{G59}{(G5772)} from{G575} the earth{G1093}.

Strong's King James

(3) They sing like a new song facing the throne, before the four living-creatures and the elders and nobody can learn the song if not the 144,000, the ones purchased from the land.

The F.O.G*

[3] These 144,000 sang a new song before the throne, the four living creatures, and the elders. No one else could learn this song—it was the unique testimony of those who had experienced complete redemption from earth.

The F.O.G Paraphrase

and they sing, as it were, a new song before the throne, and before the four living creatures, and the elders, and no one was able to learn the song except the hundred forty-four thousands, who have been bought from the earth;

Young's Literal Translation