Only a small fraction of the world of information is available on the Internet. Think of all the books and magazines that were published before the invention of computers and networks.
opyright law is one reason why much information is not online. Copyright protects authors and publishers from others reproducing their work without permission. How would an author or publisher make money if people could get everything for free on the Net?
There's a lot of good information on the Internet. But sometimes it can be hard to find the quality information among all the banner ads, chat rooms and other distractions.
Developing skills to evaluate online or print sources will help you become a savvy information consumer.