Do use contrasting colors between Parallax screens. The bicycle company Cyclemon is an expert at choosing colors that complement the image and the following page. Always remember, you can left click and inspect any website to learn more about how they coded their parallax:
Discovery of a product:
Do focus on the experience of learning about a product, not just the product itself.
Riiot Labs is a website that uses Parallax scrolling extremely well. As you continue down the page, it seems as if the content is opening up for you, kind of like a pop-up book. The Bubbles over the product is not a Parallax effect, but it is still really freakin cool. It is an mp4 video playing through a hidden video window.
An electric pool analyzer is super boring, but somehow Riiot Labs found a way to make it seem cool. The product by itself would not inspire anyone to buy it over another of equal or lesser value. It is the experience of learning about the product that makes customers want to purchase this device.
Do test your website to make sure it loads quickly. Also, waiting bars suck. If your website needs a loading bar then the content is too complex. You have me for 3 seconds and then I’m hitting the back button; especially if I’m a mobile user. Adidas has a lot of content on this webpage, but they do not have a loading bar, because they know that no one likes to wait. A better strategy is to have the important content, that you do not want coming in patchy, at the middle of the webpage. People will not scroll down until they see the information at the top, so just make that top information more like an introductory image or banner.
Do go to a more secure looking website for the actual purchase of the product. Adidas sells the idea of the product to you on the page below. Then, it takes you to a page with no Parallax scrolling effect. On this page you feel more secure and in control of the purchasing process.
Do everything like Apple. Just everything.