Eli Pariser describes all this in great detail in his excellant book, The Filter Bubble.

FORBES: How Facebook's Empire Of Opacity Is Hiding Posts You Want To See

With the help of our listeners we've done that with The Filter Bubble.

BBC: Click listeners test 'filter bubble'

That's the argument of Eli Pariser's book The Filter Bubble, which we explored in a film for Newsnight on Tuesday evening.

BBC: Are we trapped in our own web bubbles?

Thanks to some impressive Click-style crowd-sourcing, we have a slightly better idea of whether or not we really are all living in the filter bubble.

BBC: Click listeners test 'filter bubble'

The information that populates your universe depends on your filter bubble, which, in turn, depends on who you are and what you do online.

FORBES: Breaking Out of Your Internet Filter Bubble

Just as every talent has a flip side, one downside of such life-enhancing filtering is what Eli Pariser dubbed a filter bubble in which we narrow our interests and thus sometimes miss the serendipitous connections that can pull unexpected insights and friendships into our lives.

FORBES: The Revolution That's Transforming Our Lives