It is in the Event Graph panel that we are going to program the behavior of a Blueprint. Event Graph contains Events and Actions that are represented by nodes and connected by wires.
An Event is represented by a red node and is triggered by gameplay Events. A Blueprint can have several Actions that will be performed in response to an Event. The next screenshot shows two Events: InputAxis MoveForward and InputAxis MoveRight. These Events are from the ThirdPersonCharacter Blueprint of the Third Person template: