SEO

Shopify Duplicate Content and Canonical Tags: What to Know

Shopify can expose the same content at several URLs. Canonical tags are the mechanism that tells search engines which one to treat as the main version. Most of the time Shopify sets them correctly, but it is worth knowing where duplicates come from and how to check.

By FlowCart Agency · · 6 min read

Where duplicate URLs come from

  • Products reachable through a collection path (/collections/shoes/products/runner) as well as the main path (/products/runner).
  • Variant URLs with a ?variant= parameter.
  • Collection tag and filter URLs, and sorted or paginated views.
  • Theme or app-generated parameters, and tracking parameters added by campaigns.

How canonical tags handle it

A canonical tag in the page head declares the preferred URL for that content. Shopify's default themes output a canonical for products, collections and pages that points to the main version, so the collection-path and variant URLs consolidate onto the main product URL.

A canonical is a hint, not a command. Search engines can still choose a different URL if other signals point elsewhere, so keep your internal links, sitemap and canonicals consistent.

How to check your own store

  1. View source on a product, a collection, a filtered collection and a paginated page. Search for rel="canonical" and confirm each points where you expect.
  2. In Search Console, look at Pages for "Duplicate, Google chose different canonical than user" and investigate those groups.
  3. Crawl the site and look for large numbers of parameterised URLs being linked internally.
  4. Confirm your internal links point to the canonical URL, especially in the navigation, collections and blog posts.

Fixing common problems

  • If your theme links products through collection paths, change the links to the main product URL so internal signals match the canonical. Our step-by-step fix shows how.
  • If filtered or tag pages are thin and numerous, decide which ones deserve to be indexed and prevent the rest from being crawled or linked.
  • If the theme has removed or altered canonical tags, restore the correct output in the theme code.
  • Avoid publishing near-identical products instead of using variants.

A technical SEO audit will map exactly which of these apply to your store.

Frequently asked questions

Does Shopify have duplicate content problems?
It can expose the same product at several URLs, such as collection paths and variant parameters. Shopify's canonical tags normally consolidate them, but you should verify this on your own theme.
What is a canonical tag on Shopify?
A canonical tag is an element in the page head that tells search engines which URL is the preferred version of a page, so duplicate URLs pass their signals to it.
Can I edit canonical tags in Shopify?
Yes, by editing the theme code where the canonical link is output. Change this carefully, because incorrect canonicals can remove pages from search results.

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