A Extended Validation (EV) SSL certificate is a digital certificate issued in conformance with the extended validation guidelines defined by the CA. EV is the highest validation level you can get. It provides an improved level of authentication of entities that request digital certificates for securing transactions on their websites.
An EV SSL Certificate gives customers more confidence that they are interacting with a trusted website and that their information is secure. An EV SSL Certificate triggers high-security web browsers to display your organization's name in a green address bar and show the name of the Certificate Authority that issued it before the website URL.