Local citation, as defined, is the name, address, and phone number (NAP) of a business being mentioned by different websites such as directories, review sites, and industry-specific sites. Citations become a key ranking factor for local SEO as they help in building the online presence of the business and substantiating its location. The NAP information needs to be consistently available across as many citations as possible, but they also need to be correct so that search engines can understand and index the business neatly.