In short
E-commerce duplicate content is a set of substantially similar catalogue URLs that need a clear preferred page and consistent internal signals.
Mechanism and decision
E-commerce duplicate content arises when products, variants, facets, sorting and category paths expose competing URLs for one underlying intent. Shared manufacturer text is not the whole issue: the URL policy and internal signals determine which page is presented as preferred.
Decide which product and category URLs are public, how variants are represented, and which filter combinations deserve independent landing pages. Canonicals, links, sitemaps and redirects must agree.
What you can control
A canonical is a hint, not a guarantee; real stock, language or content differences can justify distinct pages.
Practical workflow
- Inventory product, variant, facet and pagination URL patterns.
- Choose a preferred URL for each indexable entity.
- Align canonical tags, internal links and sitemaps.
- Crawl representative filters and variants after release.
FAQ
No. Compare the actual product information and selection state. Distinct variants can have useful differences that need an explicit URL policy.
Redirect when the old URL no longer needs to serve visitors. A canonical can express a preference when equivalent versions remain accessible.