What is the purpose of V2 during a flight?

The purpose of V2 during a flight is to provide stall protection and maintain controllability in the air. V2 is the takeoff safety speed; it is the minimum speed that an aircraft must achieve during the takeoff phase to ensure that it can safely climb away from the runway in the event of an engine failure. At V2, the aircraft is more controllable, and the risk of stalling is reduced, which is crucial during the critical phase immediately after takeoff when the aircraft is transitioning from ground to flight.

Since V2 is specifically focused on ensuring safety during this phase of flight, it is not concerned with achieving maximum speed at takeoff, managing fuel efficiency, or ensuring the landing gear is deployed. These other aspects are important in their own right, but they do not define the fundamental purpose of V2.