I have been working full time as a Online Advertising Professional since 1996. One of the most valuable tools I have found for checking to see if my new customers business is listed on the Most Important Search Engines is called GetListed. It is very easy to use and check to see if your business is listed or not. Type in your business name and zip code. In only a few seconds they will give you a instant display showing if your business is listed or not. If your business is not listed they give you a link to add your business listing or to review your existing listing. Warring this site like many these days does not always work with Windows Internet Explorer. A sure sign that Explorer is on its way out. GetListed is located at getlisted.org The listed Search Engines are Google Maps or Google Places is the new name. Bing Business listing Yelp Yahoo Business listing Best of the Web HotFrog and YP.com. These are the main places Google checks to see if a business is listed, and then looks for customer referrals. The higher the number of these sites have your business listed on it and the total number of customer reviews your business has. The better chances your business has to end up on Page One of Google from search results submitted from your business geo location (with in 35 miles of the business address). I hope you find this information helpful.