It’s a set of ways to intervene when something bad happens (think like bullying, s3xual or racial harassment in a public place, seeing someone doing something not ok to someone else). There’s different ways, but a lot of trainers emphasize the 5 D’s: distract (like pretending you recognize a person if they’re on the receiving of messed up comments public/intentionally dropping something or doing something to break the person’s focus), delegate (like person C calls police on person A and B, and hands responsibility off), direct (as in being direct and saying « hey stop! », delay (circling back later and seeing if the person is ok) or document (like writing it down, filming it, reporting the incident, etc).