This will help some people use it more comfortably. Others still won't care about this aspect. Introduce basic background information. The Internet and its predecessor networks have been around a long time - since the 60's and 70's. But didn't make a big splash until the WWW came into being.
Internet is a vast network of computers and telecommunications networks.
Computers all over the world store information that people can access. Emphasize that the Internet and the Web are NOT the same thing. People see things in different ways, a variety of view points can be useful. Summarize and leave participants with a clear concept.