Product reviews are a valuable resource for users researching which product to buy.
Product reviews often contain a list of pros and cons, which our research has shown
to be popular with shoppers when making their purchasing decisions.
Because of their importance to users, Google Search may highlight
in the product review snippet in Search results.
Read this post for more information on when and how to provide pros and cons structured data
to improve search result snippets for your pages.
Source: Google Webmaster Central Blog
Link: New in structured data: Pros and cons
