Communication is the exchange of information between individuals through a common system of symbols, signs, or behavior. It requires a sender, a message, and a recipient. The key elements of communication are the sender, message, encoding, channel, receiver, decoding, and feedback. Effective communication allows for the expression of ideas and is essential for social and business transactions. However, there can be barriers like physical, linguistic, psychological, socio-cultural, or technical issues that interfere with the transmission and understanding of messages between parties.