What is the difference between the World Wide Web and The Internet?

So many people are browsing websites, sharing images and other data online, and for them we can say that they are consumers.

These consumers do not need to know the details about the technology that is used to enable that online content for them. The average consumer thinks that he is using "internet", although, in fact he is using "www" (world wide web service) when he is browsing websites, that is enabled over the infrastructure that is "internet".

Many hostnames used for the World Wide Web begin with www because of the long-standing practice of naming Internet hosts according to the services they provide.

When a user submits an incomplete domain name to a web browser in its address bar input field, some web browsers automatically try adding the prefix "www" to the beginning of it and possibly ".com", ".org" and ".net" at the end, depending on what might be missing. 

However, all this data is not relevant, as the important thing is that content is

available and consumed by the intended target - the consumer.

Terminology must be adequate and conformed to be digested by consumer, not the constructor.

WWW service will remain our main information space, but layman will call it "internet" to keep it simple.

Basically “the internet” is the infrastructure on which the worldwide popular “www service” is running on. However, for consumers there is not need to think of those two as separate entity as it would provoke confusion.

The Internet has no centralized governance in either technological implementation or policies for access and usage; each constituent network sets its own policies.