Have you even read my message? Or the thread you are answering to for that matter? The question is not how website owner knows I visited his website, that much is pretty obvious, but if it is the case that server-side tracking somehow allows to use GoogleAnalytics as well (that is, to notify Google from server side who has visited their website) and if this is the case — how does it exactly work. Because that's what JupiterMoon seems to be claiming.