The document provides information on performing basic life support (BLS). It defines BLS and describes the key steps and components, which include ensuring safety, checking for response, activating emergency services, performing chest compressions, opening the airway, and providing rescue breaths or defibrillation. The steps of BLS are outlined as ensuring safety, assessing response, activating EMS, performing chest compressions, opening the airway, and breathing or defibrillation. Modifications for performing BLS on infants and children are also summarized.