Call to action buttons are very important for websites and should not be neglected in any case. Getting a visitor do to a certain action translates into a conversion and that's an important part of any site. Making an effective call to action is not as easy as people might think. It's not only the color that matters, but also the shape and the message that you apply on it. You want the visitor to do a certain thing, like adding a product to cart, or registering for a service or downloading a file.