A unique and usually shorter URL (link) that can be distinguished from other links even if they ultimately go to the same Web page. This makes it possible to track which message led viewers to click on the link.
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.