Cardiopulmonary resuscitation (CPR) is a crucial emergency procedure designed to manually preserve brain function and blood circulation in a person whose heart and breathing have stopped. It involves two main components:

Chest Compressions: By pressing down on the person's chest at a steady rhythm, you help pump blood through their body, ensuring oxygen continues to reach vital organs like the brain and heart.

Rescue Breaths: Breathing into the person's mouth to provide oxygen, which is vital for their survival. Rescue breaths are given after every 30 chest compressions to help the person take in air.

CPR essentially bridges the gap between the time a person's heart stops and the time advanced medical help arrives. By performing CPR, you can significantly increase the chances of survival and recovery.