Region-specific marketing is currently utilized in a variety of marketing campaigns. A fairly basic marketing concept can be used, but it is presented to a location or market that has shown a demand for that specific product or service. This can be a certain State, City, neighborhood or even a specific building. Programs like Google Adwords lets you target these specific locations and tailor your marketing. On a more broad scale, you can target a certain demographic based on their language.
Now the ad servers don’t create this table themselves, they license it from another company like MaxMind or DigitalEnvoy, whose primary business is geolocation data. This is no enviable task; IP addresses themselves don’t necessarily have an obvious pattern in the way they are assigned like a telephone area code would. It’s a bit like solving a mystery, and the geolocation companies use a variety of methods to approach the problem. /injects>