wp_no_robots() │ WP 3.3.0

Deprecated from version 5.7.0. It is no longer supported and can be removed in future releases. Use wp_robots_no_robots() on 'wp_robots' filter instead.

Display a noindex meta tag.

Outputs a noindex meta tag that tells web robots not to index the page content. Typical usage is as a wp_head callback. add_action( wp_head, 'wp_no_robots' );

No Hooks.

Return

null. Nothing.

Usage

wp_no_robots();

Changelog

Since 3.3.0 Introduced.
Since 5.3.0 Echo "noindex,nofollow" if search engine visibility is discouraged.
Deprecated Since 5.7.0 Use wp_robots_no_robots() instead on 'wp_robots' filter.

Code of wp_no_robots() WP 5.9.3

wp-includes/deprecated.php 
function wp_no_robots() {
	_deprecated_function( __FUNCTION__, '5.7.0', 'wp_robots_no_robots()' );

	if ( get_option( 'blog_public' ) ) {
		echo "<meta name='robots' content='noindex,follow' />\n";
		return;
	}

	echo "<meta name='robots' content='noindex,nofollow' />\n";
}

SEO