Functions of communication:

Broldly the main role of communication in a social system is  : Receiving and conveying.information which may be facts, messages  or opnions;  this may take place in discourses, debates  or discussions. 

Motivating a person receiving the message, whether through an individual or through a medium of mass communication like radio, television, newspapess/journals, books or films,  towards a course of action.

This can extend from adopting a method of  family planning, changing one's food habits, to working for a social or political cause. Providing education and culture; from a class-room situation where knowledge and skills may be imparted, to dissemination of cultural heritage and values as well as cultivation of artistic interests. Entertaining, whether for personal or collective enjoyment  through public music, drama or sports. Influencing opinion to serve certain economic or political interests. These are some broad functions of communication. Most of our activities fall under one category or another.