Google considers a number of factors alongside citation directories when deciding whether to display your business listing to someone who has searched for the products or services you offer. One of the things they take into account is the proximity of your business to the location of the search. b-ume.net SEMrush which conducts competitor backlink analysis. Moz provides a number of insights from competitor analysis. A great local citation needs to be seen as credible and trustworthy by both people browsing the web and Google. This is why established brands such as the Yellow Pages (Yell) Trustpilot and Thomson Local are great places to start.