Hello
Thank you for contacting the support.
Rank Math takes the Schema data from your product pages automatically and turns it into Schema-ready content. Likewise, the aggregateRating and review fields are taken from your actual product reviews that your buyers/customers leave on your products.
https://i.rankmath.com/Ni50EF
If you don’t have any reviews yet, that is going to show up as a warning in the schema testing tool. That’s because Google will actually look for those fields.
Please acquire some reviews and ratings to get rid of the aggregateRating and review warnings.
You can fix the SKU and availability issue quickly as well: https://i.rankmath.com/wtM5aM
To fix the brand warning, head over to WordPress Dashboard > Rank Math > General Settings > WooCommerce and choose from any of the available fields to use as your product’s brands.
https://i.rankmath.com/Atiq6s
If you want to use a custom value for your Brands, you can do that by using the following code in your theme’s functions.php file:
https://pastebin.com/JEfTheYn
Replace the “Rank Math” text with your actual brand name then run your website through the Structured Data Testing tool once again.
For the GTIN, ISBN, MPN issue, you can fix it by adding that to your products using the custom product attribute feature in WooCommere or you can use this plugin: https://wordpress.org/plugins/product-gtin-ean-upc-isbn-for-woocommerce/
For the priceValidUntil warning, you have to either ignore that or add a sale price with validity to get rid of it: https://i.rankmath.com/cMqAAH
Hope that helps and please do not hesitate to let us know if you need our assistance with anything else.
“For the GTIN, ISBN, MPN issue, you can fix it by adding that to your products using the custom product attribute feature in WooCommere or you can use this plugin: https://wordpress.org/plugins/product-gtin-ean-upc-isbn-for-woocommerce/”
I installed the plugin but the gtin shema is not showing.
Hello,
Please add the following code to your theme functions.php and clear your cache then check if this resolves the issue:
add_filter( 'rank_math/snippet/rich_snippet_product_entity', function( $entity ) {
global $product;
$entity['gtin8'] = $product->get_meta( '_wpm_gtin_code' );
return $entity;
});
Looking forward to helping you. Thank you.
Hello,
We are super happy that this resolved your issue. If you have any other questions in the future, know that we are here to help you.
If you don’t mind me asking, could you please leave us a review (if you haven’t already) on https://wordpress.org/support/plugin/seo-by-rank-math/reviews/#new-post about your overall experience with Rank Math? We appreciate your time and patience.
If you do have another question in the future, please feel free to create a new forum topic, and it will be our pleasure to assist you again.
Thank you.
