A clear permission by a user/customer that the marketer may send direct messages (usually emails). Many countries have clear legislation concerning sending direct messages and sending unsolicited commercial messages can earn you a hefty fine. This is why you should ask your customers for permission to send them a newsletter, promotional material or any other email before you add them to a mailing list. You are then allowed to send emails until the user opts-out.
About the Author: Chad Klingensmith
Chad is a Sr. SEO Strategist for Rio SEO. He has over 10 years of experience in the digital marketing vertical. He enjoys researching and applying cutting edge marketing strategies to help clients achieve optimal online visibility.