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Usually because each listing was created or claimed at a different time, by different people, with slightly different formatting — "123 Main St" versus "123 Main Street, Suite 4" versus an old address from before a move. These small inconsistencies, called NAP issues, quietly suppress local search visibility.
Most businesses don't deliberately create inconsistent listings — they accumulate over time. A listing gets created automatically by a directory, claimed years later, an address changes but not every listing gets updated, a phone number changes for one service but the old number remains listed elsewhere. Each individual inconsistency seems minor, but search engines use this information — collectively called NAP, for Name, Address, Phone — as a trust and accuracy signal.
When Google sees the same business listed with slightly different information across the web, it can reduce confidence in which version is correct, which can suppress how prominently that business appears in local search results — even if the website and Google profile themselves are accurate.
A citation audit checks your business information across the directories that matter most — Google, Apple Maps, Bing, Yelp, Facebook, and dozens of smaller but still-indexed directories — and identifies every inconsistency, so they can be corrected systematically rather than discovered one at a time.
Want to know where your own foundation stands?
See a sample evaluation report →The major ones (Google, Apple Maps, Bing, Yelp, Facebook) matter most, but dozens of smaller directories are also indexed and contribute to the overall consistency picture — a full citation audit checks the top 40.
Many citation corrections involve claiming and updating a listing directly, which a business owner can do — the audit identifies what needs correcting and where.
Citation corrections typically take a few weeks to fully propagate and affect search signals, though the corrections themselves can often be made immediately.