Canonical URL Decision — Decides for every URL variant of a page whether it is the canonical URL, gets a canonical tag to another address, a permanent redirect, a noindex, a 404 or 410, or cannot be settled from the facts given, answered as JSON only with the target and a short reason per URL. Follows Google's current canonicalization guidance on duplicate content - a redirect when the duplicate is deprecated, rel=canonical when it must stay reachable (tracking parameters, print views, a produc…

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