An effective communicator understands their audience, chooses an appropriate communication channel, hones their message to this channel and encodes the message to reduce misunderstanding by the receiver(s).
They will also seek out feedback from the receiver(s) as to how the message is understood and attempt to correct any misunderstanding or confusion as soon as possible.
Receivers can use techniques such as Clarification and Reflection as effective ways to ensure that the message sent has been understood correctly.