Another new thing that Pinterest has been doing that is new is they are following your search engine and the things that you pin and like. I know this because there has been multiple pins on my feed that say “pinned for you” and they are things that I have either liked or looked at in the past. Other websites do this too, google uses advertisements from the things that you were looking at shopping to appear on the side of the screen as advertisements. Another place that does this is Facebook, it is crazy how complex social media has become. It used to be all about privacy and now who knows if following every move you make.