An SSL Certificate is a digitally signed certificate that establishes the identity of a website and uses encryption to send data to the website. The certificate is issued by a trusted authority known as a Certificate Authority (CA) and typically contains information like the Owner's name, Name of issuer, the certificate holder's public key and an expiration date.
SSL Certificates are generally used when a website wants to accept sensitive information like passwords, credit card details and other sensitive information.
You can view a website's SSL Certificate by clicking on the lock icon in the address bar of a browser.
Types of SSL Certificates.
Positive SSL Wildcard
Comodo SSL and Positive SSL provide security for one Domain Name and is best suited for small websites and blogs. Positive SSL Wildcard provides security for the primary Domain Name as well as its sub-domains, and is best suited for large e-commerce websites.