Nowadays when we want to know something we can just "Google it". It's a simple enough affair: we type our inquire, we get our links, which hopefully answers our question, and that's it. What some people doesn't know is that the links we get are usually tailored to our browsing habits. No two people get the same results. This filtering prevents us from seeing what we need to see in order to fully understand what we want to understand. It stunts our growth as individuals by only showing us what it thinks what we want to see.
Not only that, but it uses this monitoring of our activities to shows us ads that "it" thinks we want to see. The Internet should be a tool used to expose us to a great range of information, instead it's used to reaffirm misconceptions we might have, as well as telling us what we might want to buy. It's functionality is being compromised for the sake of money.
Going back to the point of knowing both sides of an argument, some people say this homophilic effect might have some uses. However, the best way to form a more objective opinion about anything is exposing ourselves to all various perspectives and, only then, reach a more well-rounded conclusion. And the Internet should be a tool to allow us to do this, not hinder it.