THETOPOZICEV
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Every one of them is a proxy invented by a vendor, which is worth remembering before optimising against any. SEO authority metrics — DA, DR, Trust Flow, Citation Flow, Authority Score — estimate link strength from partial crawls of the web. They correlate with rankings loosely because links correlate with rankings, not because search engines use them. Treating them as targets rather than indicators is how budgets end up buying scores instead of traffic.
