If you’re making shrimp cocktail, or need a very basic way to cook shrimp, poaching is for you. It’s actually the best way to cook shrimp, in my opinion.
Then you can add other aromatic ingredients if you’d like. Half of a lemon is a great addition. Squeeze the juice into the pot before adding the halved lemon.
Peppercorns and parsley are two other things you can add. These aren’t as important as the salt but are nice additions.