It helped my girlfriend get into my heart. And it can help you influence your readers to do what you want. Repetition isn't new, of course. P.T. Barnum, maybe the best marketing mind the world has ever seen, used this concept back in the late 1800s. Repeat them as often as necessary.
Repetition is hypnotic.
It's what good hypnotists use to install their suggestions in your mind. The same thing can happen in your writing. Consciously choose to repeat your main points. Don't be afraid to re-say something. The more you repeat your basic offer or basic reasons to buy, the more you will influence your reader's unconscious mind.