The home page has no server-side 301 redirect from WWW to non-WWW website version

Shopify Discussion
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Topic summary

A Shopify store owner encountered a technical SEO issue where their homepage lacks a proper server-side 301 redirect between the WWW and non-WWW versions of their domain. This configuration problem can cause duplicate content issues in Google’s index, potentially harming search engine rankings.

Current Domain Setup:

The Problem:
Without a consistent 301 redirect establishing a preferred domain version, search engines may index both WWW and non-WWW URLs separately, treating them as duplicate content.

Status: The user is seeking guidance on how to properly configure their domain settings in Shopify to resolve this redirect issue and establish a single preferred domain version.

Summarized with AI on November 18. AI used: claude-sonnet-4-5-20250929.
1

Hi, all! I have received the error “The home page has no server-side 301 redirect from WWW to non-WWW website version or vice verca. This issue may lead to appearing duplicate content in Google index. Choose a preferred domain and set up redirect from non-preferred domain version to preferred domain version.”

When I open my domain settings it looks likes this

Primary domain - abc.com

ab-c.myshopify.com - redirects to abc.com

www.abc.com - redirects to abc.com

All targets are showing as online store.

Please show some light