This bomb weighs more than an F-16 fighter and has 1 goal. How does GBU-57 work?

Zdjęcie: Każda bomba B-57 waży więcej niż myśliwiec F-16. Bombowiec B-2 może wziąć na pokład dwie takie bomby. / USAF


In the US attack on Iran, 12 GBU-57 ILO bombs were to be used. Each specified bomb is heavier than aircraft specified as F-16, F-18 or MiG-29. How does this powerful bomb work? Why have the Americans developed specified weapons? What are his options?