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Related Products by Tag Only

Makes the related products section match products by shared tags instead of shared categories, for more precise suggestions.

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Code

add_filter( 'woocommerce_product_related_posts_relate_by_category', '__return_false' );
add_filter( 'woocommerce_product_related_posts_relate_by_tag', '__return_true' );

Notes

Products without tags will show no related products.

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