What does "Amen" mean in Islam and how is it used in Islamic prayers and rituals?

"Amen" in Islam means "so be it" or "truly." It is used at the end of prayers and supplications to express agreement and affirmation of what was said. In Islamic rituals, "Amen" is often recited after reciting verses from the Quran or during congregational prayers to signify unity and solidarity among believers.