Most of us take Secured Sockets Layer (SSL) and Transport Layer Security (TLS) for granted, but over time the use of SSL and TLS certificates has dramatically changed. Once, only websites that handled secure transactions provided protection with an SSL certificate. Now search engines demand everything is protected with certificates.
Because attackers have used weaknesses in SSL to gain access to credentials, we have deprecated insecure SSL protocols in favor of more secure ones. Many of you likely became aware of the weakness in SSL when the POODLE vulnerability was first disclosed.