Lesson 6: Links You can apply what you already learned in the previous lessons to links (i.e. change colors, fonts, underline, etc). The new thing is that CSS allows you to define these properties differently depending on whether the link is unvisited, visited, active, or whether the cursor is on the link. This makes it possible to add fancy and useful effects to your website. To control these effects you use so-called pseudo-classes. What is a pseudo-class? A pseudo-class allows you to take into account different conditions or events when defining a property for an HTML tag. Let's look at an example. As you know, links are specified in HTML with <a> tags. We can therefore use a as a selector in CSS