WordPress automatically generates duplicate URLs through category archives, tag archives, paginated pages, media attachment pages, author archives, HTTP/HTTPS mismatches, and URL parameters — all of which dilute SEO ranking signals. This guide covers how to detect these issues using AIOSEO's Site Audit and Google Search Console, then fix each source: noindexing tag and author archives, adding canonical tags to paginated content, disabling attachment pages, enforcing a single canonical domain via server-level redirects, and merging keyword-cannibalized posts with 301 redirects. It also addresses external content scraping and how to verify fixes over a 2–4 week window.
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