Target your local market and potential customers.
This is one of the most effective ways for small business' to been seen on the web when targeting a local town / state and the surrounding areas.
Now companies can target potential customers in a specific geographical area.
This method of advertising is a very cost efficient form of online marketing that drives business to your website when done correctly.
Now it is possible to target locations where you ad will show on Google searches. Only computers located in these areas (blue shading in example) will see your ad.
Areas can be zoned in a circle radius format or a custom shape as the example below shows.

If you want to run an advertising campaign targeted to certain geographical areas, geo-tarketing is an essential lead providing tool.