This surah was revealed in Makkah and it has 89 ayaat.
It is narrated from Imam Ja’far as-Sadiq (a.s.) that whoever recites this surah will be saved from the vermin (e.g. insects, scorpions etc.) in the grave and will not undergo the squeezing (Fishar) in the grave.
The Holy Prophet (s.a.w.) said that drinking water in which this surah was dissolved acts as a cure and a relief from pain.
May Allah increase us in knowledge!