Yasin's letter explains a lot about the creed and faith of a Muslim. The virtue of this surah is forgiveness given by Allah SWT for people who always read it to get the pleasure of Allah. Rasulullah SAW said,

"Whoever reads Surah Yasin every night for the sake of Allah, then his sins are forgiven." (HR Ahmad).

Yasin's letter was revealed in the city of Mecca after the revelation of Jin's letter. Surah Yasin is the heart of the Koran. Rasulullah SAW said

"The heart of the Koran is Surah Yasin. It is not read of him by someone who desires the pleasure of Allah and salvation in the hereafter, but Allah forgives his sins” (Narrated by Abu Dawud).