The digital equivalent of junk mail. Spam can be an email, text message, social media direct message, or any other unwanted or unsolicited electronic communication. Marketers can ask people to actively opt into email lists and provide easy ways to unsubscribe to prevent their digital marketing communications from being considered spam.

3 Quick And Easy Ways To Build A Profitable Opt-In List
You finally realize that you need a good opt-in list. After reading countless articles and sought expert advices and have read many success stories of people creating a small fortune with opt-in lists you finally decide to have one of your own.