Changes

Google's system allows advertisers to target geographical areas, such as individual countries and cities, and depending on the infrastructure of a country's telecom system, it can even be possible to narrow banner display down to specific postal code districts. This applies to plain text ads shown directly on Google and graphical banners on AdSense enabled sites alike. Within Google's system, this is achieved by IP range identification. In other words, Google's ad-system knows from where each individual site visitor is browsing any AdSense enabled site and can thereby determine for which site visitors an ad should be displayed, as configured by advertisers within their AdWords accounts. For more specific geographical targetting, areas surrounding a specified GPS coordinate be applied and will work with mobile devices which has been are configured to reveal users' individual geo-locations, or by DSL lines where the exact location can be determined by Google's system via the internet access provider.