Transitions represent a condition such as an item being in a specific state, or a value being in a specific range. The step that follows the transition is only activated if the condition defined in the transition is true.
For example, a transition could be configured to represent this condition:
Value>50
When a the value of the point that is associated with the transition is greater than 50, the condition is true—the step after the transition will become active. If the point's value is less than 50, the transition's condition is false and the next step will not become active.