So the information might be collated on the user's computer using cookies which aren't accessible to anyone but Kiva (and obviously Google), but it is then sent to Google for them to do various things with it. One of them, as we have seen, is to serve up Kiva ads when we visit other sites after having been at Kiva. But what other usage do you permit Google to use that info for?
We did some small ad buys earlier this year with Retargeter.com (not Google), which showed Kiva ads to people who had visited Kiva previously. But we are winding those down and just to clarify: the small amount of retargeting we did was achieved through a totally separate cookie than Google's.
My understanding is that Google Analytics cookies are just for analytics. Google Analytics are used by 57% of the top 10k most popular websites (according to Alexa), so it's been vetted by a lot of top sites. I'lll dig into this a bit more though!
Thanks,
John