UNIT 1. INTRODUCTION Introduction is an expression to know one's identity. We need to introduce ourselves to a clearer communication process with whom we talk, about what we are talking about and other conditions. 1. Formal Introduction A formal introduction is used when you introduce yourself in a formal room for example. Self in front of class, workroom, meeting room and Official forums, such as seminars. 2. Informal Introduction Informal introduction is used when you introduce yourself to someone at about the same age with you. Informal introduction id used in a nonformal situation. Usually used on unofficial events or forums, such as introductions when in public meet new friends or friends.