Communication involves the sharing of meaning between a sender and receiver of information. It is a process that includes encoding a message by the sender, transmitting the message through a medium, receiving and decoding the message, and ensuring the intended and received meanings are shared. There are various purposes of communication including emotive satisfaction, motivation to organizational objectives, and providing necessary information for decisions. Barriers to effective communication can occur due to differences in frames of reference, selective filtering, use of in-group language, information overload, semantics, status, and time pressures, but these barriers can be overcome through techniques like effective timing, regulated information flow, parallel channels, empathy, feedback, and active listening.