Describe your setting within your story in such a way that the reader sees, feels, smells, and maybe even hears your created setting. This doesn’t necessarily mean you have to use many many words to describe it. After all, you don’t want the reader to put your book/story down. Just choose your words wisely. Test out what you wrote on a friend and see what they think. I tried to read a book by a very famous author (whose name I won’t mention) and put it down because they over described. I lost interest fast. The movies were better.
When I’m describing a setting, I imagine I am actually there. I use action verbs. For tense there are times when linking verbs must be used. I try as best I can to use descriptive words that pack a punch (so to speak). Also, try to create intrigue, mystery, tension, or another type of feeling as you’re describing (this will depend on the type of scene you’re creating).
Description isn’t as hard as I might be making it out to be. Just write your scene, then do some ‘nip and tuck’ later to tighten things up.