The meaning of SSL encryption is to protect the server-to-client information or the client-to-server information from being monitored and tampered with.
Now some of the mainstream web sites have been accessed through HTTPS, search engine for such sites included also no problem.
The specific configuration flow is probably:
1, first service needs to install OpenSSL
2, Apache needs to load Mod_ssl
3, find an SSL server, STARTSSL can apply for a certificate for free, the specific process can refer to this article: https://www.freehao123.com/startssl-ssl-apache-ngnix/
Configure the server to support HTTPS in Apache environment