Add brand (taxonomy) to product meta tag

Hello,

Thank you for contacting Rank Math support today.

Here is a filter function that will help you create a custom variable for your meta title:

/**
* Action: 'rank_math/vars/register_extra_replacements' – Allows adding extra variables.
*/
add_action( 'rank_math/vars/register_extra_replacements', function(){
	rank_math_register_var_replacement(
		'my_product_brand', //variable to add
		[
			'name' => esc_html__( 'Product Brand', 'rank-math' ), //variable name
			'description' => esc_html__( 'Custom variable description.', 'rank-math' ), //variable description
			'variable' => 'my_product_brand', //variable itself
			'example' => get_my_product_brand_info(),
		],
		'get_my_product_brand_info'
	);
});
	
/* define you callback function, how and where to get the variable data */
function get_my_product_brand_info(){
	return 'my product brand';
}

Insert this code in your theme’s functions.php file and you should be able to use it by inserting this custom variable to your meta fields: %my_product_brand%

Let me know if this code works on your end.

We are looking forward to helping you.