Basic first aid involves the immediate care given to someone who is injured or suddenly ill. It includes assessing the situation, ensuring safety, and providing necessary assistance until professional help arrives. Common first aid techniques include performing CPR for cardiac emergencies, applying pressure to stop bleeding, and using the Heimlich maneuver for choking. Knowing basic first aid can help save lives and reduce the severity of injuries. It is important to stay calm, call for help if needed, and use available resources like a first aid kit. Learning these skills can empower individuals to respond effectively in emergencies.