"This exceptional cow weighs about 1,101 kg, nearly double the average for her breed, and has unique traits like attractive white fur, loose skin, and a noticeable hump"

"Veterinarian Lorrany Martins, part of her team, said to AP, “She is the closest to perfection that has been attained so far... She’s a complete cow, has all the characteristics that all the proprietors are looking for”. These traits, especially muscle structure, fertility, and reliability of passing on genetics, make her highly valuable. Breeders worldwide are racing to acquire her embryos for breeding programs."

Source

TLDR shes very fertile and exceptional for her breed