All that gorgeous photography and stylized copy that makes your product sell so well — it’s also what’s taking precious seconds to load when you call up your site on a smartphone. You need rich media to properly showcase what you’re selling, but you also need your site to be speedy enough to load quickly on small screens and conform to web standards. Amazon estimates that every extra 100 milliseconds it takes a page to load cuts its profits by 1 percent. It’s not just that users won’t wait around for 10, 20 seconds for your site to load — Google uses site speed in its search rankings. Slow sites will take an SEO hit, hurting the odds of your customers finding you organically — i.e. without paid advertising.