Validation is a key SSL feature. We’ll help you learn about the different levels of validation and how to tell them apart.
Single domain SSLs only allow one unique domain or subdomain to be secured, wildcard SSLs allow multiple subdomains to be secured under one unique domain, and multi-domain SSLs allow multiple unique domains and subdomains to be secured with a single certificate.
Each brand of SSL is known as a Certificate Authority (CA). A CA is an organization that is trusted to sign digital certificates. It also verifies the identity and legitimacy of the company or individual requesting a certificate and, if the verification is successful, issues the signed certificate.