これをください。

Use this phrase when you want to purchase a specific item you are looking at, or when ordering something from a menu. 'Kore' means 'this', and 'kudasai' means 'please give me' or 'I'll have'. It's a polite way to make a request.

欲しい商品や食べ物を指して注文する際に使います。丁寧な依頼表現です。