Google offers a number of ways to market your product or service locally. After all, not everybody is interested in selling to the entire planet.
If you want to use Google to market your business locally, the very
first thing you should do is get yourself a Google
Local Business Center account. It's free, and is a great way to appear at or near the top of page one for your particular type of business.
You've probably seen a map with local businesses appear in Google's search...