If you want visitors to trust your website more, use the GeoTrust True BusinessID EV certificate. In the address bar of the browser will be the name of the organization to which the certificate was issued, as well as the two-letter country code.
When ordering a certificate for a domain with www, the certificate will also protect the domain without www, but only if the ordered domain is a second-level domain, for example domain.ru. To do this, when generating a certificate request (CSR), specify the domain name with www. This rule applies only to third-level domains of the form www.domain.com.