Mouth-to-mouth is a method of artificial respiration used in emergencies when someone is not breathing. It involves a rescuer sealing their lips around the victim's mouth and blowing air into their lungs. This technique helps deliver oxygen to the person until professional help arrives or normal breathing resumes. This practice is often associated with CPR (cardiopulmonary resuscitation), which combines chest compressions with mouth-to-mouth breathing. While mouth-to-mouth can be effective, many people now use hands-only CPR, which focuses solely on chest compressions, as it is easier and can still be life-saving in critical situations.