Descriptive adjectives are words that provide more information about a noun, helping to create a clearer picture in the reader's mind. They describe qualities such as color, size, shape, and texture. For example, in the phrase "the blue sky," the adjective "blue" describes the color of the sky. These adjectives can enhance writing by making it more vivid and engaging. They can be used in various contexts, such as describing a beautiful garden or a tall building. By using descriptive adjectives, writers can convey emotions and create a stronger connection with their audience.