Oh, Omegaverse is what you call a unique realm. It is from the 2000s and belongs to the genre of alternate universes in fanfiction. It imagines if there were humans and wolf kind of behaviors combined, made up of Alphas, Betas and so on.
An Alpha is generally powerful and has the commanding presence of ''the leader''. Omegas, on the other hand, are pretty much at the opposite end of scale: they tend to be portrayed tenderly and also as occasionally fragile. And Betas are sandwiched right in the middle. They’re interposed between the different roles society assigns you.
It's an odd contrast in life that this genre should be known for the sexy tone and heat between its characters, which differs greatly from most modern fanfiction, not unlike an old dame who can’t resist baring her amateur hour on stage!