This surah was revealed in Makkah and has 135 verses. It is mentioned in a narration from the Holy Prophet (s.a.w.) that whoever recites this surah will get the reward equivalent to the number of companions of the Holy Prophet (s.a.w.) from the Muhajireen and Ansaar.
Imam Ja’far as-Sadiq (a.s.) has said that Allah (s.w.t.) befriends the ones who recite this surah and this person will receive his book of deeds on his right hand. His sins will be forgiven and he will get so much reward that he will be pleased on the Day of Judgement.
This surah should be recited before war, going before a tyrant ruler and trying to guide a community towards the path of Allah (s.w.t.).
May Allah increase us in knowledge!