All entities in the universe have some form of communication between them, resulting in their inter-dependency. Communication determines the relationship between you and your environment. Your body always communicates towards its environment. Your sensors always receive information from your environment. Love opens your sensors, hate shuts them down.
Life forms have very diverse communication systems.
The primary importance of communication between people is to get a message across. Different languages andgreat distances are a barrier to that. The quality of global communication is in many cases at a very low level. All people have core instincts that are identical. All things you do and understand without learning, which are highly important for your survival on Earth.