In short. Enable Rank Math's Global Meta setting for empty category and tag archives, then check the page head for a noindex robots directive.
Definition: Rank Math has a Global Meta setting named Noindex Empty Category and Tag Archives. When enabled, it applies a noindex instruction to category and tag archive pages that have no associated posts.
Key facts
- Rank Math places the control in the Global Meta part of its Titles and Meta settings.
- Rank Math defines an archive as a collection of posts or custom posts in a taxonomy, organized in pages.
- The setting targets empty category and tag archives, which Rank Math says can otherwise be created and indexed.
- Category Archives Robots Meta and Tag Archives Robots Meta are separate controls for those archive types.
- Google documents
noindexas a page-level robots meta rule that tells search engines not to show the page in search results.
Where is the empty archive setting?
Open the WordPress menu, choose Rank Math, then Titles and Meta. Rank Math's guide says the settings are organized into sections and places this control in Global Meta, alongside the general Robots Meta controls. Turn on Noindex Empty Category and Tag Archives, then save the settings.
The guide describes Global Meta as a set of default Title and Meta settings for pages across the website. It also says that Robots Meta options in this area provide default values, while individual post settings can override them. The empty archive control is described separately from those general defaults, so it should be read as a condition-specific switch for empty taxonomy archives.
What does the switch cover?
WordPress creates archive pages for categories, tags, and other taxonomies used on a site. Rank Math describes an archive as a collection of the posts or custom posts assigned to one taxonomy. Its empty archive explanation concerns categories and tags with no associated posts. Enabling the switch applies no-indexing to all empty category and tag archive pages covered by that description.
The same Rank Math page documents Category Archives Robots Meta under the Categories settings. It lets you use the Global Robots Meta or choose custom metadata for category archive pages. The Tags settings contain Tag Archives Robots Meta, with the same choice between the Global Robots Meta and custom settings. Those archive controls are separate from the empty archive switch and should be reviewed independently when populated category or tag archives need their own robots directive.
Rank Math's page does not state a precedence rule for a conflict between the empty archive switch and a custom archive-level robots setting. It also names category and tag archives specifically, so this entry does not extend the setting to custom taxonomies.
How can you check the resulting directive?
Google's robots meta documentation describes noindex as a page-specific instruction placed in the HTML head. For an empty category or tag archive, inspect the rendered HTML for a robots directive such as:
<meta name="robots" content="noindex">
Google says the rule instructs search engines not to show the page in search results. The page-level setting can be supplied by a CMS, so the absence of a field for editing HTML does not prevent a WordPress plugin from producing the directive.
The directive must be readable during crawling. Google's documentation says robots meta settings can be read and followed only when crawlers can access the page. A robots.txt disallow on the archive URL therefore prevents Google from reading the page-level instruction. WordPress documents the wp_robots filter as a way to filter directives included in the robots meta tag, and its reference shows noindex as a boolean directive in a PHP example.
Related terms
- How do I set noindex on a page in Rank Math?
- How do I exclude a taxonomy from Rank Math sitemaps?
- How do I control author archive indexing in Rank Math?
FAQ
Does this setting noindex every category and tag archive?
No. Rank Math describes it for category and tag archives with no associated posts. The separate category and tag Robots Meta controls cover archive-level metadata more generally.
Is this the same as setting No Index in Category Archives Robots Meta?
No. The documentation presents the empty archive option in Global Meta and the category or tag archive Robots Meta controls in their taxonomy sections. Review both when the intended scope includes empty and populated archives.
What should appear in the page source?
Look in the HTML head for a robots meta directive containing noindex. Google gives <meta name="robots" content="noindex"> as the page-level example and requires crawler access to read it.
Sources
- Rank Math, "Rank Math ‘Titles and Meta’ Options and Settings", undated
- Google Search Central, "Robots meta tag, data-nosnippet, and X-Robots-Tag specifications", 24 March 2026
- WordPress Developer Resources, "wp_robots", undated
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