A misplaced service area costs more in a dense market in a crowded metro market than it does in a quiet one.
Anything unverifiable should be removed rather than corrected. None of this replaces a decent website; it makes the one you have easier to find.
In practice, record the canonical version of the list of services somewhere the office manager can find it. For restaurants and cafés, discovery still begins in a map or a directory more frequently than on a homepage.
Get the facts to agree, and business data providers will do the rest without being asked, which is why it keeps being rediscovered. What follows from this is that keep a change log; six months on, nobody remembers which field was edited or why.
Across a large sufficient sample, the correlation between authoritative data and profile views is hard to dismiss.
It's unglamorous work with an unusually reliable return. In practice, confirm by phone or postcode lookup, not by memory.
See also
67% Before you consolidate 72% In the file 49% Avoiding a misplaced service area 12% Fixing contradictory data across sources 44% Mapping NAP records
The finish line isn't perfection; it's a profile that nobody has to argue with. The data from most clean-up projects shows the majority of profiles carry at least one contradiction.