When you drive down the Highway, you are not really "using" the road in the sense that you are not physically "doing" anything with the road. Instead you are using your car, which happens to work the best on a road. Your car actually uses the road to perform its duty of getting you somewhere. This analogy illustrates that you don't really use the Internet (Highway); instead, you use tools (cars/trucks/tractor-trailers) that use the Internet.
The tools that this guide discusses are:
