Got this notification when I opened Chrome when coming back to my desk after lunch.
"We changed our privacy settings to allow us to snoop on what you're looking at and shove you ads accordingly. Feel free to opt out, but we'll probably opt you back in when you aren't paying attention."
Stop using Chrome outside of work then. Unfortunately we usually can't control the software environments we work in, but separate your work computing from your home computing. The stuff that Google would gain about your personal life is mostly gained from your personal browsing anyways, assuming you don't use your work computer for personal browsing (that's what phones are for).