: Duplicate content - Redirecting mirror sites A domain has 12 mirror sites and all of them are indexed. As a matter of fact one of the mirror domains (44 Moz domain authority) is competing

@Jessie594

If your concern is soley about SERP ranking and these sites are direct mirrors of your primary site (ie: no change to the content on any of the mirrors) then the other option would be to add a rel='canonical' meta tag to each page ti identify the primary domain as the canonical page. This was specifically done to allow duplicated content such as from mirrors to work properly with SERP ranking. By doing this you will not affect the root benefit of a mirror site (where the content is accessible under multiple domains, if this is in fact required) but you will retain the primary site as the authoratative source for the mirrored sites as well and will maintain the primary site as a high level in SERP ranking.

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