They tell us how the noun looks, sounds, smells, tastes, feels, and thinks. Some writers love adjectives more than their own wives. Used appropriately, an adjective can add flavor to a noun, giving us a vivid sensory impression of it. The adjective, red , modifies the noun that follows it. It tells us that this is not just a Mustang, but the red Mustang , and therefore we'd better take notice of it.
Adjectives used as identifiers are good.
However, problems arise when writers use adjectives for purely descriptive purposes. Reading this sentence is like trying to speak through a mouthful of marbles. The adjectives, and the commas that separate them, act as speed bumps that hamper the smooth flow of words. What's more, the sentence has lost its focus. It's hard to tell because the adjectives give equal weight to both.