In other words, photograph or screenshot each profile before editing; reversions do happen.
The gain is seldom dramatic on any single day; it appears as faster indexing over a quarter. The system rewards agreement, not volume, which is why a hundred untidy entries lose to twenty clean ones.
The work sits awkwardly between marketing and administration, which is why it gets skipped.
Realistically, check what a competitor in a crowded metro market has claimed before deciding where to submit. Where competitors are untidy, complete data is sufficient to take more direction requests.
As a rule, a neat citation profile makes every other local effort work harder, assuming the basics are already in place. Treat the core contact record as a single source of truth, not as a field to be improvised per site. Data flows outward from aggregators, therefore an error at the source reappears in places nobody submitted to.
By and large, getting this right buys a wider organic footprint without touching the website at all. Behind the ranking sits a fairly ordinary question: can this business be confirmed twice over? If a listing cannot be claimed, document it and move on rather than duplicating it.