SSL Certificate
An SSL certificate is a type of digital certificate that provides authentication for a website and enables an encrypted connection.
Why SSL Certificate Require
HTTPs instead of HTTP

Whether it’s HTTP or HTTPS both are protocol designed to transfer information between computers over WWW (World Wide Web). HTTP, does the same thing as HTTPS like transferring information like document, file, image, video between computers over internet, but it is not in an encrypted format, due to this it becomes vulnerable to attacks happens over internet.
Purpose of HTTPs
The purpose of HTTPS is to ensure the protection, integrity, and privacy of the data exchanged between a server and a client (usually a browser). It also authenticates websites and confirms its trustworthiness. The protocol is enabled by installing an SSL Certificate on the website’s server.

HTTP vs HTTPs
HTTP
HTTP is Hypertext transfer protocol. Simply put – Rules to sending and receiving text-based messages. As we all know, computers work in a language of 1’s and 0’s i.e. Binary language. Therefore, potentially every set of 1’s and 0’s construct something, it could be a word.
HTTPs
Hyper Text Transfer Protocol Secure (HTTPS) is the secure version of HTTP, the protocol over which data is sent between your browser and the website that you are connected to. The ‘S’ at the end of HTTPS stands for ‘Secure’. It means all communications between your browser and the website are encrypted.