Those who enjoy surfing the internet and admire the beauty in websites have almost definitely noticed the introduction of a new design concept: the parallax. The parallax itself is a technique that explores component independent movement, creating astonishing 3D visual effects in the page. This effect relies heavily on the scrolling event, where each component can move at different velocities - during the scrolling - in order to grab users’ attention and direct it to a certain area/information. But what types of parallaxes exist? Why and where should we use them? These are a few questions we'll try to answer in this article.