Your Shopify store must install Ryviu app. If you don't, click HERE to install it.
You must have a Ryviu premium plan.
How to add Q&A widgets?
Step 1: Log in to your Shopify store admin
Step 2: Go to Online store > Themes > click Customize button next to your Shopify Online Store 2.0 theme
Step 3: Select Products > select the product template that you want to add Q&A widget
Step 4: Click + Add section, in Apps, select Question & Answer
Step 5: Click Save
Here is a short video on how to add Ryviu Questions & Answers block to your product page.
All the best,