"There are thousands of places where a citation - a mention of your business name and address, phone number or website - can be built for your local business. Every local business should focus on building a strong core of citations that not only broadens the visibility of the business, but also strengthen search engines' "trust" in the validity of the business's existence. High-quality, authoritative citations are also viewed by experts as the #1 ranking factor in competitive local search markets." MOZ.com