The document discusses how to form and use superlatives in English. It explains that superlatives are used to compare three or more objects and indicate which object has the most of a quality. Superlatives are formed by adding "-est" to short adjectives and adverbs or using "most" with long adjectives and adverbs. The prepositions "in" and "of" are used after the superlative, with "in" followed by a singular noun and "of" usually followed by a plural noun. Examples are provided to illustrate superlative usage.