Canonical URL Guide: Prevent Duplicate Content with rel=canonical
The rel=canonical tag tells search engines which URL is the authoritative version of a page. Learn when to use it, common mistakes, and how to audit your site.
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Tags: url, seo, html
Canonical URL Guide: Prevent Duplicate Content with rel=canonical Duplicate content doesn't just mean copying text from another website. It means Google finds the same content at multiple URLs on your own site — and that causes ranking dilution, crawl budget waste, and link equity fragmentation. The tag is the primary tool for telling search engines which URL is the authoritative one. When Duplicate URLs Appear (More Often Than You Think) You may not realize your site is creating duplicate URLs. Common causes: Trailing Slash Variants Most servers serve the same content on both. Pick one and canonicalize to it. www vs. non-www Both resolve unless you've set up a redirect. Search engines see two separate pages. HTTP vs. HTTPS If your old HTTP URLs are still accessible (even if HTTPS…
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