Add product tag to meta t

Hi,

I’ve a wordpress site with woocommerce.

I would want to insert product tag in title editing product’s titles and metas templates.

Inserting this tag “%%tag%%” this is not showing in snippet.

I would want to know which is the right variable to insert for the product tag
Many thanks

https://www.ads-software.com/plugins/wordpress-seo/

[Moderator Note: No bumping, thank you.]