Theoretically all persuasive copy has it own fundamental.
There are 8 elements and they are:

1. Get their attention

For this part, you have to be different than everybody else in your chosen market.

Be controversial. Show them the current study about their problem. Present them in facts and figure.
2.Focuses on the customer

Don’t talk about how great is your product. Tell them how you can help them to achieve their goals,...