In the simplest terms, local citations tell map providers that a business is real and reachable. Across a large sufficient sample, the correlation between trustworthy data and branded queries is hard to dismiss.
Discovery apps weigh source quality as well as source count, therefore where a citation sits matters.
Ember Index Co
Taken together, check what a competitor within a single postcode has claimed before deciding where to submit.
The Willow Digest
Sources consulted