Using Co-Authors Plus on an editorial site raises a few SEO considerations: author archive pages, duplicate content risk, and schema markup for posts with multiple bylines. Here is how to handle each.
Author Archive Pages with Co-Authors Plus
Co-Authors Plus creates functional author archive pages for all co-authors, including guest authors who do not have WordPress accounts. This is one of the plugin’s SEO benefits — each contributor has an indexable page that lists all posts they have contributed to, building authorship signals for each writer.
For E-E-A-T purposes, each author archive should have a complete bio with credentials, a profile photo, and links to verifiable external profiles (LinkedIn, personal site). Fill in the author profile thoroughly — a sparse author archive page provides weak authorship signals.
Preventing Duplicate Content Between Author Archives
On a post with two co-authors, the post appears on both author archives. This creates a situation where the same post is reachable through multiple URLs. Search engines handle this well in most cases because the post canonical URL points to the single post page, not the archive. The archive pages themselves have different URLs and different post combinations, so they are not duplicate pages.
If you are concerned, check that your SEO plugin is correctly setting the canonical on archive pages to the archive URL itself (not to the single post) and that pagination is handled with rel=next/prev or canonical correctly.
Rank Math and Co-Authors Plus
Rank Math has built-in support for Co-Authors Plus. The Article schema that Rank Math outputs for posts will include multiple authors when Co-Authors Plus is active. Verify this by checking the structured data output on a co-authored post using Google Rich Results Test. You should see an author array with multiple Person entries.
In Rank Math settings under Titles and Meta, then Authors, ensure Author Archive pages are set to index rather than noindex if you want author archives to appear in search results.
Yoast SEO and Co-Authors Plus
Yoast SEO also has compatibility with Co-Authors Plus for schema output. The configuration is similar — check that author archives are set to indexable in Yoast under Search Appearance, then Archives, then Author Archives.
Guest Author SEO Considerations
Guest author profiles in Co-Authors Plus create author archive pages without requiring a WordPress user account. For SEO, treat these the same as registered author archives — ensure the guest author profile has a full bio, a profile photo, and relevant credentials. Guest author archives with sparse or empty profiles add little SEO value and may dilute the site’s authorship signals if left empty.
Schema Markup for Guest Authors
For posts authored by guest contributors, the Person schema in the article should reference the guest author’s details — name, bio, and any external profile URLs. Co-Authors Plus stores guest author information in its own profile fields, and SEO plugins that support the plugin will read from these fields for schema generation. Verify the output on posts with guest authors specifically, as the data source differs from registered user profiles.
For advanced author schema configuration, custom author archive templates, or YMYL site authorship setups, a WordPress developer can configure the full Co-Authors Plus and SEO plugin integration.