Cost Per Click (CPC)

The percentage of recipients who unsubscribe from an email after it is sent. In large-scale marketing, some unsubscribes are expected, but it’s a metric that can be monitored to ensure you aren’t putting off your audience with either the frequency or messaging of your email advertising.

Hick’s Law is a psychological principle that, in a marketing and web design context, relates to the number of options presented to a user. The more options a user is given, the longer it will take them to make a decision. Therefore, best practices in web design, for instance, include minimizing clutter and non-essential options from major pages, in order to focus user attention on those items you consider most important.

This is a web design technique in which the background and foreground elements of the design scroll at different speeds as you move up or down the page. This creates the illusion of depth, and can also help to highlight elements of a page that contain key information.