Google Rich Results are the extra visual and interactive features shown in the Google search results. It was initially known as "rich snippet" or "rich card". New content standards have been added by Google Search to the rich results help page. These new guidelines directly disallow you to markup products or content that is widely prohibited or regulated, or that can facilitate serious harm to self or others. Google stated that rich results will not be provided for such items. Product examples include firearms & weapons, recreational drugs, tobacco, vaping products, gambling-related products, and other products that can pose acute threats of physical harm.
The new guidelines stated in Google Search Central were as follows:
The new policy is already in force, hence rich results in Google Search will not be visible. This states that Google will be excluding display information about costs, availability, or star ratings, among other things. In order to promote uniformity and clarity, Google stated that "this policy change will unify the rich snippets feature with other Search surfaces that display product information from merchants." If in case the rules are violated, Google won't take any active action in Google Search Console; instead, it will simply stop displaying rich results in Google Search.