They are watching me....

[harrypotter]

Oh yeah, same here. Some creepy stuff has happened in the past year where I would have conversations with friends about certain things that I never even searched the web for & then later see ads for these exact things on the internet. Something weirder happened. There was a time my friend was simply thinking about a specific bottle of vitamins, never having searched the web for them & later that day he saw ads for them on his browser 

EDIT:
I notice that on most websites you're able to stop seeing ads by clicking on the top right X & clicking on stop seeing this ad. In google searches - you can stop seeing those annoying sponsored ads that show up first in results by clicking the down arrow then click stop seeing this ad. In Youtube, it's the same process but you click on the little "i" in the bottom left corner next to the timer.