[ILUG] Advertising in GMail
colm at tuatha.org
Mon Nov 20 14:12:53 GMT 2006
On 20 Nov 2006, at 14:00, Timothy Murphy wrote:
> This is very interesting.
> I wonder how finely they can identify you?
Theory and practice diverge somewhat here. In theory, one could
reconcile ISP connection logs with IP addresses to identify you as an
individual (or at least a household) from your IP address, but nobody
really does this in practice, because a single entity doesn't manage
both sets of logs.
Google can of course identify you through your cookies, unless you
how this information is (and, of course, isn't) used. Using IP
address to geolocate someone is notoriously unreliable; and is of
course further confused by anything proxy-related. Much more
reliable to ask the user to volunteer their location information.
> I guess they just go by your ISP, but it's nicely frightening to
> think google might know all about you.
> Incidentally, do advertisers on google pay less if they can reduce
> their "clientele"?
Adwords and Adsense charge per click, not per view. Therefore it's
in everyone's best interests to target the advertisements as closely
as possible to people who are likely to click on them. In fact, much
of our sales department spend significant time convincing advertisers
to be *more* restrictive in their targeting rules, so as to hit a
narrower audience, rather than the opposite. It's counterintuitive
at first look, but when you realise that ad views which don't result
in a click are effectively wasted, not to mention annoying, it makes
Colm (not speaking on behalf of Google)
Colm Buckley / colm at tuatha.org / +353 87 2469146 / www.colm.buckley.name
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