Take some time to think about the differences between a short and a long conversation that you've had with someone about a specific event. Chances are that the short conversation lacked details and got straight to the point. The long conversation most likely had so much detail that you could almost picture yourself being there now. Or, think about getting directions from friends. If you were invited to a party, would you prefer the directions that just said, 'By the school,' or would you prefer detailed directions that provide specific streets? Description is an important part of daily life and has an even bigger role in writing.