Grade AR-165Technical

Consistent canonical signals across the site

Canonical methods express a preference and differ in strength: redirects and rel=canonical are strong signals, sitemap inclusion is a weak one, and they stack when combined. Google also prefers HTTPS over HTTP and URLs in hreflang clusters, and linking internally to the canonical URL helps it understand the preference.

Sources

1
Google Search Central · 2026How to specify a canonical URL with rel="canonical" and other methodsdevelopers.google.com

AGrade A: official documentation or a standard. A grade describes the provenance of the sources above; it is not a probability that a change will work. The effect basis says how the size of the effect is known: measured by a study, taken from an industry report, only documented without a size, or not quantified.

Put this evidence to work

Investigate overlapping pages and canonical signals

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