Obviously so that once someone does it (likely out of curiosity), Google can tailor it's ads and sponsored links towards things you may buy.
If you have a Gmail account, then you should already know that Google already does this, and well beyond the boundaries of good taste. Besides, I thought that Amazon's head narcissist, had figured out how to ship stuff to us, before we actually clicked to buy it. It seems like magic, but its really gross invasion of privacy, covered up by a few mentalism parlor tricks'
It's to make our lives easier by showing us what we want to buy... remember Google does no evil; it's in their motto after all, Right?
.......... Right.....?
It's most likely because of my age, as I'm 40 some odd years older than the internet, and that's what makes me work bass ackwards. But, I tend to think about what I want, then I use Google to find it for me.
In any event, Google's new strategy is a revolutionary backdoor approach to an old axiom, which should now be altered to read, "money and its fool are soon parted company".
I'm probably a minority of one in this sentiment, but I'd still, honest to God, rather have the NSA surveilling me than Google.