Now people in every part of the world have access to the same TV programs. When you go to a new city to work, study, or take a vocation, you will already have something in common with the people there. When you meet new people, you will be familiar with at least some of the same TV programs. This gives you something to talk about.
Most people use TV as a way of entertainment. People who play sports usually like to watch sports on TV. People who like to cook watch cooking shows. If your friends and family watch some of the same programs as you watch, they can learn more about things that interest you. This is a form of communication that helps people to create mutual understanding among them.