Sometimes I feel like somebody's watching me

I find it creepy enough when you get FB ads promoting the shoes you were just looking at. But one of my baby apps seems like it's listening in. Had our bowling tournament last night, and this morning one of the articles was "Is it safe to bowl while pregnant?" (Answer: yes.) But how freaking random is this article? Who would ever wonder about this? This has happened several other times, and each time it's super weird. How did they know?? Talking to you, big brother.