Recently I have noticed the ads being presented to me are no longer relevant.

Previously I thought google knew me pretty well, we hang out often and google knew what I liked, but it seems recently that it's losing interest, giving me ads that I don't want, for services in  places I am not 

Is it something I've done? I just don't feel like we're connecting any more.



Seriously though, ads used to be well targeted to me and location specific whereas all I get these days are ads which should be aimed at Americans. 

I've recently switched between a couple of different pcs and android devices and wonder if I've somehow declined targeted at and ads?