Duplicate Content and Canonical Tag Decision Tree
Resolve duplicates without guesswork.
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Diagnose duplicate content on my site. Site and platform: [SITE_AND_PLATFORM]. Examples of duplicate or near-duplicate URLs: [URL_EXAMPLES]. Current canonical tags, redirects, and parameters: [CURRENT_SETUP]. For each duplicate group follow this tree: 1. Are the pages truly the same content at different URLs (www and non-www, http and https, trailing slash, uppercase, index.html)? IF yes THEN pick one version and use permanent redirects, with canonical tags as support. 2. Are they the same content with parameters (tracking, sorting, session IDs)? IF yes THEN set canonicals to the clean URL and avoid linking to the parameter versions. 3. Are they near-duplicates (product variants with the same description, location pages with templated text)? IF yes THEN differentiate with unique, useful content or consolidate. 4. Is the content syndicated from or to another site? IF yes THEN use a canonical pointing to the original or ask the partner to; ensure my original is published first. 5. Are print, AMP-like, or mobile versions separate URLs? Handle with the right annotations. Output a table: Group | Example URLs | Cause | Chosen canonical | Fix | Verification (view source, inspection tool, crawler). Add common mistakes (canonical to a redirecting URL, multiple canonicals, canonical in the body, mixing noindex and canonical), and a prevention checklist for new templates. No ranking promises.
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