Domain validation: DV SSL validation certificates are ideal for blogs, personal websites, small-business websites, and informative sites. Basically, any website that doesn’t deal with customers’ financial information (payment card numbers) or sensitive details. Organizational validation: OV SSL validation certificates are best suited for non-profits, educational institutes, medium scale businesses, and ecommerce websites as a minimum. Basically, any businesses or organizations that deal with their users’ sensitive information. Extended validation: EV SSL validation certificates are best suited for healthcare institutions, eCommerce websites, military/government websites, large scale enterprises with high traffic, etc. If you’re dealing with your customers' financial information or sensitive healthcare information, transferring internal information such as trade secrets, employee's personally identifiable information (PII), sensitive political and government-related information, then you should be using an EV SSL certificate to provide the highest level of validation and authentication.