What is the main purpose of issuing "traffic" to another controller?

Issuing "traffic" to another controller is primarily intended to provide coordination for separation action. When a controller alerts another controller about traffic, they are essentially communicating about the positions and movements of aircraft to ensure safe separation. This is particularly important in busy airspace where multiple aircraft are operating in close proximity to each other. By issuing traffic, controllers are ensuring that the receiving controller is aware of potential conflicts and is able to take appropriate actions to maintain safety. This communication fosters teamwork and situational awareness, which are essential components of effective air traffic management. The emphasis is on maintaining a safe environment for all aircraft in the sector.