A list of email addresses that your business can send marketing emails to. Email lists are usually segmented—or broken into smaller groups based on their interests or behaviors—so you can customize your messaging to be more relevant, interesting, and effective. To create them, you can collect email addresses at the time of purchase, through pop-up forms on your website, and a variety of other simple tactics.

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.