The document discusses the four main types of communication: verbal communication, non-verbal communication, written communication, and visual communication. It provides details on each type, including that verbal communication involves speaking, non-verbal communication is physical ways of communicating without words, written communication includes business letters and newsletters, and visual communication displays information visually through images, signs, and electronic forms like video. The document also shares information on specific communication methods like public speaking, body language, email, and the internet.