I realize how little I actually know about description

I was trying to write a review on a show and while I was writing, a thought came into my mind about description. I always had trouble describing things the surroundings of a world, the clothes a character is wearing, the physical descriptions of a character or even the architecture of a building. I do not know how to describe the surrounding of any environment neither do I know to write in a way that feels real. I know you shouldn't too much prose but compared to most people, my writing is fairly mediocre and I cannot seem to describe things fairly well. This is my greatest flaw but is there any way to remedy this? Does anyone else have this problem?

As long as you have writing strengths you should play to those. Shakespeare gave us pretty much no description but some very poetic and witty dialog. We need plot and character, but readers don't actually need description.

If you want to change it you could practice by looking at something like an outdoor setting or a piece of art and just start describing it.

The most straightforward answer is to practice, practice, practice. That and try reading more books; ideally from a variety of authors with different styles. This will help expose you to those styles to see which you like best and feel most natural to you.

For practice, what you could do is use your surroundings as inspiration. Look at a tree or a car or a person or a friend and consciously think what you notice about them and how you could string those features together into a short paragraph. You could even go the extra mile by practising on photos, writing them down, coming back to them at a later time for a second or third crack, and compare the various attempts.

Hope that helps.

"Describing so it feels real" is very subjective... Meditate on the use of description for a few minutes. Why do we even bother describing our characters, scenes, and worlds?

I'm sorry I can't be of proper help but here's one random tip: targets and style of description should walk hand in hand with the narrator's personality and overall style.

I feel obliged to note that this is only really meaningful advice if there is a narrator.

I'll second what those above me have said. Especially practice, experiment and see what works best for you.

Personally, I feel that 'less is more' when it comes to description. I find if I'm given one or two good descriptors I'm usually able to fill in the rest of the picture just fine. I feel trying to create a specific image in someone's mind is kind of futile anyway, since we all naturally associate different images, feelings, etc, with different words. I say let the reader's memories and experiences do the bulk of the work, and just guide them with a few well chosen details. Plus that way they're less likely to miss important details by tripping over trivial ones.

Of course there are some who have the ability to really paint a picture with words. If you find you are gifted with that, great. But mostly practice. Write something and read it to yourself after a week, when it's not as fresh in your mind. See if the description flows or you find yourself skipping through it.

Well, I also have had some difficulties with description, but I feel I've been at least getting better at it in some aspects as I've been writing my fanfic, Pokémon Mystery Dungeon: Reflecting Balance. I still feel as if I have a long way to go, though.

My main concern is being able to describe stuff without having descriptions disrupt the flow of the narration.

I have the same problem as the above poster. Hard to make descriptions without making them disrupt the flow. My usual tactic is basically narrating those parts like Dillios from 300.