The document discusses adjectives and provides examples of how adjectives can be used to describe nouns by modifying short sentences with additional descriptive words such as "naughty", "soft", "colourful", "deep", "old", "creepy", "large", "fierce", "white", "flashing", "quiet", "narrow", "freezing", and "glamorous". Adjectives are describing words that can be added to sentences to provide more detail about nouns.