WWW vs. HTTP
WWW and HTTP Definitions
What is HTTP?
“http” stands for Hypertext Transfer Protocol and as the name suggests, it’s the protocol for communication through internet. It is the communication standard used by your web browser in order to communicate with the server of the website that you are viewing .
What is WWW?
www is a sub-domain or prefix which stands for world wide web, which is just a sub-domain. Historically everybody uses www and people type a web address with www, but there is no technical reason to use www. Web sites can have an url with out www.