The document discusses the main components and language features of greeting cards. Greeting cards typically include a receiver, opening, content, closing, and sender. They commonly use simple present and past tenses as well as wishing sentences. Greeting cards are made for particular moments like birthdays, graduations, weddings, baby showers, and anniversaries. Common types of greeting cards mentioned include birthday cards, wedding cards, get well cards, baby born cards, anniversary cards, condolences cards, and graduation cards.