The technical benefit of learning adjectives is the ability to accurately describe people, places and things. If one has never been taught adjectives, he won't be able to describe criminal activity to the police. For example, adjectives are necessary in order for someone to say the suspect was wearing retro pink sunglasses and drove away in an old blue van. Adjectives can also help you to accurately describe items at work and leisure. In the workplace you can explain that you ran out of mango-flavored Italian ice, while in leisure you can describe a hotel you stayed at as beach-side and Bahamian.
Adjectives also help writers to bring their writing to life. They not only describe the visual, but also convey the other senses such as taste, sound and touch, which can bring the reader into the writing. For example, instead of writing, "The sky was dark and I knew it was going to rain," you could write, "Dark clouds covered the midday sky for miles. I could smell and almost taste the fresh, sweet moisture in the air that told me it was going to rain." The latter sentence brings the reader into the scene by describing how it looked, smelled and tasted.
Learning adjectives greatly increases vocabulary, which in effect increases communication skills. For example, if adjectives were not taught, one could not describe himself by saying, "I'm hungry" or "I'm sad." With adjectives you can describe what type of person you are, how you feel and why you reacted to a situation in a certain way. For example, if you wanted to apologize for speaking rudely, you could say, "I'm sorry I said that. I've had a rough day and I'm feeling sick and tired."
Aside from communicating and writing more clearly, learning adjectives is important so that students can write quality essays, understand what they read, do well on tests and move on to a higher education. If adjectives were not taught to students, their reading and writing skills would be crippled and they would not be able to move through education's institutional structure easily. Not being able to pass middle or high school could vastly limit their career paths in the future.