Absolutely, there are government agencies who are so interested in your movements that someone at Google will single you out for a damn good sifting.
Or, it's just a machine that says "Oh, hey, your location matches the stored location for a McDonalds, let me fire off some pre-assigned action". As a side effect they now know you're a McDonalds visitor, which just means you'll see McDonalds adverts and vouchers instead of those for health food shops.
It's not even all take - install Google Opinion Rewards and they'll even be pretty upfront in saying "Hey, we think you went to Tesco yesterday - what did you reckon?" and give you a few pence. I've had fifty quid in two years out of them for that.