An AI scan alone tells you where you're being named. It doesn't tell you why. A site audit alone tells you what's broken. It doesn't tell you which broken thing is actually costing you retrieval. A GSC report tells you what queries drive impressions today. It doesn't tell you what your site is prepared to answer tomorrow.
Each signal is a partial view. The mistake most agencies make is treating one of them as sufficient.
Correlation is where the actual work lives. When three independent methodologies point the same direction — the scan says "you're not named for cleaning queries in your metro," the site audit says "your reviews are trapped inside an iframe assistants can't read," and the source graph shows the assistants are retrieving competitor review pages instead — that's not an opinion. That's evidence.