Local citation building is the process of getting your business listed accurately on relevant directories, data aggregators, and industry-specific sites, with consistent name, address, and phone number (NAP) details across every one.
Consistency matters more than most people expect: even a small discrepancy — "St." on one listing, "Street" on another, an old phone number that never got updated — can create doubt for search engines trying to confirm your business's legitimate identity and location, which can hold back local rankings even when everything else is well optimized.