The mechanism is confidence, not magic. When forty sources agree on your address in the same format and three disagree, confidence stays high; when half still carry an old suite number or a retired phone line, the entity fragments and the algorithm hedges by showing you less often. What matters is the absence of contradiction, not the number of listings held.
Run it from one source of truth: a document with the exact legal name, the address in postal format, the primary phone number, hours and the short description, from which every new listing is created. Audit annually and after any move, rebrand or number change — a relocation handled badly is one of the few local events that costs visibility overnight.