> neutral metric of relevance
Organic search? Corrupted by SEO, so not neutral. The advertiser's ability or willingness to pay, is at least something of relevance? It reveals at least someone has the product you want, and possibly a deal.
Organic search? Corrupted by SEO, so not neutral. The advertiser's ability or willingness to pay, is at least something of relevance? It reveals at least someone has the product you want, and possibly a deal.
You can read about how it was in 2008-10 here:
https://albertcory50.substack.com/p/working-at-google-ads
Undoubtedly it's different now.