Definition: Geo-targeting is the practice of creating and delivering online advertisers to users based on their location. Geo-targeting can improve marketing ROI for online merchants by taking advantage of regional trends.
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.
Some publishers and networks have even developed performance-based marketing plans based on geo-targeted ads. Ads and marketing are only placed and paid for when there have been proven results to show that this venture is worth it. It has always been very effective to target a certain demographic based off of their age, gender, or career. This can be taken even further by taking a look at certain locations and what demographics reside there. Website data can be used to determine what geographic locations are most frequently perusing a site and that area can be targeted as well.