This document introduces metaphors and distinguishes between literal and figurative language. It defines a metaphor as a type of figurative language that compares two concepts by implying they are similar. There are three main types of metaphors: simple metaphors directly state one thing is another, similes use "like" or "as" to compare things, and implied metaphors leave the comparison implicit through descriptive language. Examples of each type are provided to illustrate how metaphors creatively reveal similarities between concepts. The document explains that metaphors allow for vivid description and force readers to interpret comparisons.