What signals authority versus marketing fluff?

Authority signals include verifiable expertise, third-party validation, detailed case studies with constraints and outcomes, named credentials, and consistency across the site. Marketing fluff includes confident assertions without evidence, recycled generic content, inflated claims, and language that any competitor could copy verbatim.

Case studies are difficult to fake when they include specific constraints, decisions, and outcomes. Detailed metrics, client quotes in the customer's own words, and named results signal authority because they are costly to fabricate. Media mentions, industry awards, and peer recognition from credible sources cannot be self-created, which makes them stronger signals. Author credentials (specific expertise, linked profiles, a visible body of work) demonstrate sustained authority rather than borrowed credibility. Content freshness (publication and revision dates) signals accuracy; outdated content signals declining authority. AI systems can detect inconsistencies across a site, unverifiable claims, recycled language, and lack of semantic coherence. The test for authority versus fluff: would the content survive scrutiny from a skeptical buyer who checks every claim? Authority signals survive because they involve external validation and measurable outcomes. Fluff disintegrates under inspection.