The amount of data tech companies collect about us and our internet usage is not surprising anymore. Google knows an absurd amount about you and your habits, and so does Facebook. Thankfully, you can quickly see what Facebook thinks it knows about you via its ad preferences page — information the company uses to show you advertisements on the site. If you don't like what you see, you can use this page to adjust and remove your interests. Take a look ahead to see what the page looks like and how to fix it.