A DV certificate is your opportunity to show the public that any information they send to your site will be encrypted. Along with top-level encryption, you'll also receive an HTTPS web address and a secure padlock icon that indicates your website is protected by an SSL certificate. These days, your typical web user doesn't know what it takes to protect a website, but they know to look for that padlock icon and HTTPS when deciding if a site is secure or not.
Plus, as the web continues to move to an "HTTPS Everywhere" environment, with all sites equipped with at least a basic SSL certificate, businesses, like ecommerce websites and other sites that collect user information, are opting for an Organization Validated (OV) or, especially, Extended Validation (EV) certificate.
That's because indicators like HTTPS and the padlock icon are becoming more and more commonplace, so businesses are looking to EV to help them stand apart from their competitors, since these certificates are the only solutions that come with the green address bar, the most universally trusted indicator on the web.