The past 13 or so years, I have really noticed this kind of filtering unfolding. It’s made my job as a search engine optimization expert very difficult as Google and other engines now customize the search results being served up for each person based upon previous searches and what they click on. This filtering is happening on FaceBook, Youtube & even Netflix.
Here’s a great TedTalks video with Eli Pariser presenting. Eli does a great job explaining the filter bubble phenomenon and why we need to be concerned about it.