On Page Seo
Duplicate Content
Identical or substantially similar content that appears at more than one URL, either within the same site or across different sites. It confuses search engines about which version to index and rank.
Why Duplicate Content Matters for SEO
Duplicate content splits your ranking signals across multiple URLs, so none of them perform as well as a single consolidated page would. It wastes crawl budget and can lead to the wrong version of your page showing up in search results.
How Duplicate Content Works
Google tries to identify the canonical version and consolidate signals, but it doesn't always pick the one you want. Use canonical tags, 301 redirects, and proper URL parameter handling to tell Google which version matters.
Common Mistakes
- Running HTTP and HTTPS or www and non-www versions without redirects
- Letting faceted navigation create thousands of duplicate parameter URLs
- Syndicated content without canonical tags pointing to the original
Want to go deeper?
Read the full guide: On-Page SEO →
Sources & Further Reading: