Of all the SSL certificates, this is of the highest level, giving a green bar identification to the address bar of your website. This certificate is more detailed and hard to earn than the Organization Validated one and includes some additional steps other than the ones included in the OV process. The process includes checking of the physical address of the business, complete documentation of the owners and organization and verification and validation on each step.
The EV issuing criteria is defined by the Guidelines for Extended Validation and includes a stringent process. One of the biggest advantages of having a EV website is that no one can impersonate or copy your website, the content can be copied but the green address bar will only be enabled by actually earning the certificate. EV certificate provided higher security and, therefore, it earns higher trust from your consumers.
Many big and reputable organizations and businesses have this kind of validation and many businesses actually noticed significant progress and improvement in online transactions and customer trust. However, you need to be really careful about choosing the company for this process. It is better that you set initial meeting, and more if needed, to understand how they could cater to your need and are authorized to provide you with EV Validated certificate.