What is the most important means of communication for you? write as much as you can about it..

Communication is very important for us.We can make friends,say something good to another person to support him.Of course ,we can say something bad,but i think,that we shouldn't do it.Communication helps us to speak with people who have different nationalities.For example,we learn English to speak with people who live in America or GB.So,it's very important.