A hover state (also called a rollover state) is the slight animation that is triggered when a user rolls their cursor over a link. This helps ensure that site visitors know what they can and cannot click on throughout the site. A hover state can be as simple as a button changing colour or as complex as design elements moving or fading in and out.

Understanding the type of people who visit your site is a very important task because you can use that information to enhance your site to suit them.