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.

Building a Highly-targeted Opt in List: When Money Lies Beneath the Lists
Are you successful with your Internet business? Better yet, do you think you are successful with your online business? When most online entrepreneurs are asked with these questions, they often brush it off.