I have seen a movie about the whore of Babylon but never understand it

The Whore of Babylon or Babylon the Great is a symbolic female figure and also place of evil mentioned in the Book of Revelation in the Bible. Her full title is stated in Revelation 17 (verse 5) as Mystery, Babylon the Great, the Mother of Prostitutes and Abominations of the Earth (Greek: μυστηριον, Βαβυλὼν ἡ μεγάλη, ἡ μήτηρ τῶν πορνῶν καὶ τῶν βδελυγμάτων τῆς γῆς; transliterated Mysteriōn, Babylōn hē megalē, hē mētēr tōn pornōn kai tōn bdelygmatōn tēs gēs).