A press without a trigger is a chase. The difference between the two is the moment of coordination, every player on the team agreeing, in real time, that this is the moment to press. That agreement comes from a trigger: a specific cue everyone has been taught to recognise.
This page introduces the common pressing trigger families, the cues that activate them, and the structural mistakes that turn a well-drilled press into an isolated chase. It is the practical companion to the deeper Pressing Analysis page in the Tactical Concepts section.