Additionally, you can show your emotion and willingness to other people when you talk with them. For instance, a smile can bring a sense of friendliness; therefore, people can talk with you comfortably. You can make friends more easily and the impression about you will stay in people's memories longer. Besides, face-to-face communication can help you reflect yourself a lot. During a discussion, eye contact, posture and speech can show a person's confidence, persistence, ability and determination to win the debate. If you can use these factors effectively, you are likely to get the upper hand. That is a reason why world conferences are not held online. People in important positions from different government gather, in addition to use logical and persuasive language to present their opinions, they also take the advantages of face-to-face communication.