Measuring and recording the movement of eyes as they look at a web page. In digital marketing, eye tracking is often used to figure out what parts of a web page or email people look at first or spend the most time looking at, which is often displayed as a heat map. Marketers use this data to strategically place elements, such as call-to-action buttons, where they are most likely to be seen and clicked on.

The 3 Things To Avoid When Emailing Your List
When you decide to have an opt-in list, it is not just a matter of sending your subscribers your promotional newsletters or catalogs.