Citation listing or local link building will help you in local SEO. It will increase the local visibility in local search. Citations are especially important for businesses that operate within a limited geographic range, like a certain city, because it is in part by citations that Google can determine that a certain business is active within a certain city and not the one next door. Through the effective use of citations and other SEO tactics a small company can outflank a large company on the search engines because it can prove itself to be more relevant to local search results than a national firm that must focus on a very broad market.