People who have great situational awareness do two things really well:
They are aware of many things in their immediate environment – not just the person or object they’re looking directly at.
They can quickly scan a room or area and decide which nearby people and objects are safe and which pose a potential threat.
Situational Awareness is about how well you are aware of what’s near you and what’s going on around you. It also entails being able to rationally and quickly tell which people or objects might pose a potential threat.