“Ameen” means “O Allah, respond” or “so let it be.” It is said after a dua and at the end of Surah Al-Fatiha, asking Allah to accept what was just supplicated. The Qur'an assures us Allah is near and answers the one who calls.
“And when My servants ask you concerning Me - indeed I am near. I respond to the invocation of the supplicant when he calls upon Me...”— 2:186 (Saheeh International)
Ask Noor can explain when to say Ameen and the etiquette of making dua.
Ask Noor — free on the App Store