Google Filter Bubble — Google creates a profile built on one’s browsing history — including places like Facebook and Youtube — to direct one’s searches using its product.
This is why people searching for the same word often end up with different first pages when using Google.
Google makes assumptions on what one might be looking for hence one might never find what one wants.
DuckDuckGo, its Paoli-based competitor that does not use tracking, explains it here.
By the way, did you see where Facebook is making news stories disappear that don’t match their political preference?
Google Filter Bubble