According to Google.
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 pros and cons in the product review snippet in Search results.
Here is an example web page with JSON-LD encoded structured data that could be used for the above search results experience. Note that the text in the structured data must match the text on your page.
You can tell Google about your pros and cons by supplying pros and cons structured data on editorial review pages. When you’re adding structured data to your web pages, you can use Rich Results Test to make sure it’s correct and valid for Google Search. The tool has been recently extended to check for pros and cons structured data in addition to all the other structured data types supported by Google Search.
If you do not provide structured data, Google may try to automatically identify pros and cons listed on the web page. Google will prioritize supplied structured data provided by you over automatically extracted data. We tested this with website owners, and received positive feedback on this capability.