• Number of questions to display - this option defines how many questions will be shown under the 'Product Questions' section at the product page. If the actual number of questions exceeds this value, the rest will be hidden under an expand link.
• Number of answers to display - this option defines how many answers will be shown under a question by default. If the actual number of answers exceeds this value, the one(s) with the lowest Helpfulness rating will be hidden under an expand link.

Email notifications tab:

In this tab, you can configure the notifications settings of the extension.  Select the email form for each of the listed notifications type and email template notify product question.