Effectiveness of a newsletter is commonly measured by the amount of delivered messages that are actually opened (and presumably read) or the percentage of readers who "click through" on a link in the message.
Your own definition of effectiveness will vary depending on your newsletter-publishing goals, but you will no doubt want to know as much as you can about which of your messages are opened, read, and which links are clicked.
In this chapter, you will learn how to implement and use the user-tracking and click-tracking features of phpList. These include:
Enabling user tracking (we refer to user tracking as the visibility of whether or not a message has been opened by a particular recipient)
Enabling click tracking (we refer to click tracking as the visibility of which links in either our text or HTML messages are clicked on, by which users)
Examining user/click statistics in greater detail using the "statistics" menu