A business rarely disappears from local results overnight; it fades as its records go stale.
In most cases, the businesses that win here are not the loudest, only the most consistent. When the core contact record matches everywhere, comparison sites treat the record as settled, particularly for a newer business.
Where competitors are sloppy, clean data is enough to take more qualified enquiries.
Think of map pack entries as the paperwork data aggregators confirm before they trust a listing. It is unglamorous work with an unusually reliable return.
Beyond that set aside time to rebuild twice a year rather than treating it as a one-off project.
Claim what exists before creating anything new, duplicates are harder to remove than to avoid.
Give one person the logins and one document the truth; ambiguity is what causes drift.
Confirm by phone or postcode lookup, not by memory.