SSL stands for Secure Sockets Layer. It is an encryption layer that encodes information that is exchanged between a client and a server, protecting the transmission of sensitive and private data.
This is a MUST have for any site that client input passwords, priovide credit card numbers e.t.c
You can verify that your site is secure using this link
All SSL-protected sites display the https:// prefix in the URL address bar.
Domain Validated Certificate (DV): Domain Validated certificates are certificates that are checked against domain registry. There is no identifying organizational information for these certificates and thus Acmetek do not recommend these to be used for commercial purposes. Visitors to a website with DV certificates cannot validate, via the certificate, if the business on the site is legitimate and thus often DO NOT trust this type of certificate. It is recommended using these types of certificates where security is not a concern, such as protected internal systems.
Organization Validated Certificate (OV): Organizational certificates are Trusted. Organizations are strictly authenticated by real agents against business registry databases hosted by governments. Documents may exchange and personnel may be contacted during validation to prove the right of use. OV certificates therefore contain legitimate business information. This is the standard type of certificate required on a commercial or public facing website. OV certificates conform to the X.509 RFC standards and thus contain all the necessary information to validate the organization.
Extended Validated Certificate (OV): Nothing provides more trust and security than Symantec Extended Validation Certificates. It is used by most of the world’s leading organizations. They have found that switching from OV to EV certificates increases online transactions and improve customer confidence. It is no longer a luxury but a necessity. Sites protected with a EV SSL Certificate display a green browser bar to quickly assure visitors that the organization’s legal and physical existence was verified according to strict industry standards.