What the audit checks
The Business Profile is the single biggest lever in local search, and most of what's wrong with one is visible from the outside: a missing secondary category, no photos in two years, a description that doesn't mention the service, reviews that stopped arriving in spring, reviews nobody replies to.
The audit checks the profile's completeness — categories, hours, photos, description and attributes — then its reviews: how many, the rating, how many arrived recently, and what share got a reply. Every number sits next to the same figure for the three businesses in the map pack, so the gaps are obvious.

