A slider is used to rotate through a collection of marketing messages or callouts. These can be in image or html form. There are controls to show the previous and next messages. The slides are usually shown with an eye-catching effect, such as a fade, wipe, or other intersting transition. Sliders are usually found on homepages and they are used to entice people further into the site to more specific topics. They differ from carousels in that they focus on messages and engagement.