Question: what is the difference between raw and cooked shrimp?
Answer: Shrimp must be eaten cooked, so if you buy it raw, you need to cook it. Most cooked shrimp you purchase are just boiled or steamed, and chilled. If that is how you like to eat it, it is obviously most efficient to purchase it that way. If you prefer to use it in a dish with sauces, cook it yourself.