The internet is all about relevance! Websites contain pictures and text. Many of these are also links which can be clicked and cause the browser to open another page.
The most common use of the internet is to type some words into a search engine and find any website which contains those words. What this means is that you can get millions of results when you search for something. Most of them, but certainly not all, will be relevant to what you were wanting to learn about.
Not everyone trusts the internet as a source for reliable information about historical or scientific facts. Almost anyone can write something on a blog or a social networking site. The fact that a lot of the information is false helps me learn to sort it out and separate the true from the false.
But just because something may be false does not mean that I cannot learn something from the people who post it. I can learn a lot about people by reading what people are saying. Their opinions on a variety of subjects can be very relevant to me.
The internet provides a way for me to talk to people who I would otherwise never meet. It connects me to them and therefore makes my life relevant to others.