What is difference between HTTP and HTTPS? What is SSL certificates? What is TLS ?

What is difference between HTTP and HTTPS? What is SSL  certificates? What is TLS ?

What is HTTP?
The development of HTTP was initiated by Tim Berners-Lee at CERN in 1989

HTTP- Hypertext Transfer Protocol is an application/website protocol. HTTP is an foundation of data communication for the world wide web where hypertext represent the hyperlink to other resources,so the any person can easily access

What is HTTPS?
HTTPS is an extension of hypertext transfer protocol.
Full form of HTTPS is hypertext transfer protocol secure.
It is more secure than HTTP,it widely use The communication protocol is encrypted using Transport Layer Security (TLS) or Secure Sockets Layer (SSL)

The main Moto to development of HTTPS are authentication of accessed website and protection of privacy and integrity.
The authentication aspects of HTTPS requires a trusted third party to sign server-side digital certificate.

If your website is HTTP then you can also convert it into HTTPS by SSL certificate

Google ranks the website/bolg which is HTTPS.
HTTPS is highly Secure website protocol
All popular websites and blogs are use HTTPS protocol