Chris Lake writing for Econsultancy describes these as “experiential web design trends” because they directly affect a user's website experience. The idea behind these features is to encourage user interaction and certain behaviors. Not all of them will be appropriate for all websites, of course.
One useful feature is sticky navigation or sticky content. This is an item that stays in the same fixed position when the user scrolls down the page. It's mainstream enough that I hardly notice when websites do this; when I do notice it, my first thought is “of course that navigation is right there where I left it!” If you want to encourage users to share your content, you can put social sharing buttons (for Twitter, Facebook, etc) in fixed positions, not just navigation. Or you could make sure your “related articles” box is sticky to encourage visitors to read more content.
Some websites have become so popular that their style has escaped out into the wider web, to be copied in many different places. Or maybe the style itself is so versatile that it shows up everywhere. Take grid layouts for images, for example. You'll find them on Pinterest, Etsy, eBay, and even Lady Gaga's website. Such layouts let users take a lot in at a glance, without forcing them to give more weight to any one thing. They're worth considering for your e-commerce website.
You should also consider inline form validation and auto-saving of forms for your website. Lake notes that this feature will boost form completion rates, and expects to see more of it in the future. And it doesn't have to be fancy or complicated. “Show a little green tick icon (or similar) when all is okay. Or a red cross if things go awry.” Twitter's form not only offers both of these when you fill out your form, but explains the problem on lines that received a red X. Knowing WHY a particular line threw back an error will do a lot to decrease user frustration!
Lake characterizes another little feature that you can add to your website as “persuasive content.” I think of it as providing a sense of urgency. For example, Expedia does this when you're checking out a hotel by telling you how many other people are looking at that hotel. Amazon does it by telling you that you can get a particular item tomorrow morning if you order by a certain time – and includes a ticking clock countdown to emphasize the point. I'm sure you can come up with other ways to create a sense of urgency around converting that are more specific to your business.
Of course, creating a sense of urgency isn't the only way you can gently tweak your visitor's feelings. Better still, you can do it in ways that make them smile and don't leave them feeling manipulated – because it's small, but obvious. Lake uses the example of White Stuff's checkout basket cartoon on its shopping cart page. It sits there with a little frown, until you put something in it; then it smiles. Or take Google Maps' StreetView icon; when he's exploring Hawaii for you, he carries a surfboard!
You can even play with your visitors' emotions AND build in useful functionality. Photojojo features a little “do not pull” lever on its pages; when you click on it, the lever turns red, and a hand with a long arm comes down and pulls the page up. What a cool way to scroll! And what a sneaky way to encourage a particular behavior.
Lake lists many more features you can use to enhance your visitors' experience of your website. Consider them carefully, and be sure to test them. A touch of whimsy might not be appropriate for the website of a professional accounting firm, for example, but it might be just the thing for a hydroponics farm trying to foster a down-home feeling. You might find that features you initially reject can be adapted to suit your needs perfectly, when you apply a little thought, some creativity, and the right approach. Good luck!
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