One of the most popular types of marketing is permission marketing. This type relies on placing advertisements and promotions in front of people who gave their consent to be marketed to, through various media such as email or SMS. If you have an opt-in box on your website that says “Yes” then this means customers can receive promotional materials from businesses they want contact with like product updates, advertising for other products by the same company, promo codes for discounts off future purchases at a store one already shops at regularly–the list goes on. Ultimately, when you “opt-in,” you agree to give access to much of your personal contact information in order to receive updates about the company.

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