Site certificates form an essential part of providing reassurance that the site you are visiting is genuine. A site certificate shows you that a secure connection has been established and secure communication can take place.  It will also demonstrate that you are not being tricked to enter your details on a fraudulent website. Learn how to  check whether a website is secure.

Both server certificates and certification authority (CA) certificates are sometimes called site certificates. When referring to a server certificate, the certificate identifies the Web server presenting the certificate. When referring to a CA certificate, the certificate identifies the CA that issues server and/or client authentication certificates to the servers and clients that request these certificates.

a digital document that is authorized by a trusted third party

a server certificate presented by a server during a SSL handshake

A certificate authenticating a network host or virtual host and signed by a Certification Authority (CA). A site certificate contains the site's public key.