The document discusses different types of language and register used in existing products, including direct mode of address in images and text, informal versus formal address, puns, alliteration, and rhetorical questions. Direct mode of address in images uses eye contact to engage the audience, while in text it draws attention through titles and headings. Informal address is more casual using slang, while formal avoids slang and is more serious. Puns play on words for comedy, and alliteration repeats initial sounds. Rhetorical questions intrigue readers without answering to encourage buying the product.