Authority Stack

Also called: Source Authority Stack

Common prompts: "what is an authority stack," "AI authority stack," "what does authority stack mean"

Definition

An authority stack is the layered set of credentialed sources — clinical bodies, peer-reviewed literature, trade press, retailer reviews, expert creators, community discussion — that AI engines use to compose authoritative answers in a category. The authority stack is the structural map of who the engine treats as credible.

Why it matters

The authority stack determines what kind of brand evidence translates into citation surface. In healthcare, the stack runs FDA, then peer-reviewed literature, then Mayo Clinic, then WebMD, then Reddit. In finance, SEC filings, then Bloomberg, then Morningstar, then trade press, then Reddit. A brand needs presence — earned media, third-party reference, expert mention — across the layers of the stack to win consistent citation. Communications strategy without an authority stack map invests blind.

Example

A retirement advisor wants to surface in AI answers on "best retirement strategies for high-net-worth clients." The authority stack in that category runs SEC, then fiduciary trade press, then Morningstar and Kiplinger, then academic finance publishing, then high-credibility Substacks. Building presence across that stack — not just buying ads on consumer finance sites — is the citation strategy.