One of the aspects which differentiates a Muslim from a non-Muslim is the belief in the Aakhirah (Hereafter). Muslims believe that they will be held accountable for wrongdoings and rewarded for good. This is the core aspect of the message in the holy Qur’aan to which Allāh سُبْحَانَهُ وَتَعَالَى draws our attention throughout so that we believe in Him. In reinforcing this message, Allāh ﷺ describes extensively the scenes of the Day of Judgement.
Sūrah Mursalaat discusses in detail the catastrophic scenes on the Day of Judgement when the record of deeds of each and every individual will be laid open in front of them. The shock and horror of that day will be extraordinary.