From https://www.udemy.com/course/copywritingquickstart/ :

• Refer to the audience using the word "You". Keeping the user's attention will make him feel more concerned and he won't want to leave as much.

• Use the word "Free" when possible to remove barriers and friction and reassure users.
• Use the word "Because", so to explain why the product is useful. "Because" is necessarily followed with an explanation, and in the case of marketing copywriting, the user will be looking for a reason to make a purchase.