Corroboration and Digital PR
A claim in one place is a claim; the same claim in several independent places is a fact. This chapter covers digital PR read at the sentence level, reviews as evidence you don't write, the hierarchy of mentions, and original data as the play that compounds.
Everything so far you can do on your own website. This chapter is about the part you can't: getting the rest of the web to agree with you. Chapter one put it simply, and it's worth repeating because it drives everything here: to an engine, a claim that appears in one place is a claim, and a claim that appears in several independent places is a fact. Corroboration is the work of turning your claims into facts.
Digital PR, reframed
The SEO industry has spent two decades chasing links for their ranking power, which bred an economy of placements where the link was the product and the words around it were filler. Answer engines flip that. They read the sentence, not just the link. A trade publication writing "[your business] has been manufacturing filtration systems in Dandenong since 1994" corroborates your founding date, your location, and your specialty, and every one of those repeated facts makes an engine more confident naming you. The same link with the anchor text "filtration systems" buried in a generic listicle corroborates almost nothing. When you brief anyone who writes about you, from a journalist to a partner to a directory editor, the goal is sentences that repeat your canonical facts, in their words, on their site.
Reviews are corroboration you don't write
For any question with a local or reputational dimension, review platforms punch far above their weight in answers, because they're independent, structured, and full of the exact language buyers use. A steady flow of detailed Google reviews, the kind that mention the specific service and outcome rather than just "great work", feeds the engines evidence about what you do and how well, in a form they trust precisely because you didn't author it. Build the ask into your delivery process rather than running review drives in bursts, and reply to what comes in; the replies are content too. If your review footprint is years old and thin, this is often the single fastest corroboration gap to close.
The hierarchy of third-party mentions
Not all mentions corroborate equally, and the ordering is intuitive once you think like a cautious engine. Recognised industry publications and genuine news coverage sit at the top: hard to get, heavily weighted. Contributed expertise comes next, your named people quoted or writing in places your market reads, which corroborates the entity and the authority at once. Quality directories and association memberships form the reliable middle: unglamorous, but they repeat your canonical facts on established domains. At the bottom, adding nothing, are the paid placements on sites that exist only to sell placements. Engines discount what looks like manufactured consensus, so a corroboration strategy built on junk isn't a cheap version of the real thing. It's a different thing that doesn't work. Fewer, better mentions is the whole strategy.
The strongest play: give the web a reason to cite you
The ceiling on asking for coverage is that you're asking. The way past it is publishing something other people need to cite: original data from your industry, a survey of your customers' market, benchmark numbers nobody else has gathered, a genuinely useful annual report on your corner of the world. Original research earns mentions you never requested, from writers you never contacted, and every citation of your data corroborates your authority on the whole subject. It's the most expensive item in this chapter and the only one that compounds on its own. This book practises the advice: its own claims will be underwritten by our study of AI visibility across 100 Australian businesses, published as part of this series, because telling you corroboration matters and then asking you to take our word for it would be a strange way to behave.
Corroboration is the slowest lever in Part III, measured in months, which is exactly why it's defensible: competitors can copy a page format in a week, but they can't copy three years of accumulated independent agreement. Next chapter, we go back on-site for the most mechanically liftable format there is: questions, answers, and the markup that labels them.