APM

Actions per Minute (APM) is a measurement for the speed at which a user is able to interact with the game...

Actions include:

  • Selecting units
  • Moving units
  • Launching attacks
  • Setting research tasks
  • Building structures
  • Building new units
  • Issuing repair or retreat orders

In short, any productive mouse click or keypress is an action. Thus an action can consist of several clicks / keypresses to deliver a productive result.