Add a FAQ section to all your product pages. Then optimize it for SEO with powerful keywords and add the JSON-LD snippets.
Flawless FAQs can earn you a prominent position in a rich-results box on Google SERP!
For this technique to work correctly, it’s important that your FAQ page provides a way for users to propose new answers.
To get more context about the JSON-LD approach to Structured Data you can read my recent article How to boost your pages SEO with JSON-LD.
If you don’t want to invest time in manually creating JSON-LD snippets for each FAQ page, you can use the free FAQ JSON-LD Generator created by Saijo George. I would also recommend the Google Documentation for the FAQ Structured Data (I strongly recommend to use the JSON-LD; Microdata is quickly becoming obsolete). If you are more technical you can go directly to the FAQPage definition on Schema.org.
Franco Folini lives and works in the eCommerce territory, a wild area between the Kingdom of Technology and the Kingdom of Marketing. He speaks fluently the language of both realms. For many years, Franco has been helping people bridge the divide and successfully collaborate.
If you want to find out more about Franco, visit his LinkedIn profile or send him an email folini[at]gmail.com
Franco Folini 
Hi Franco, Thanks for sharing my little FAQ Generator
Thank to you Saijo for offering this great too for free!