Follow this tutorial to collect and display reviews for each of your product pages.
1. From your Kudobuzz dashboard, click on Customize Widgets. Select Review Form Widget from the left side panel and copy the code on the page.
2. In your Bigcommerce admin, click on Storefront Design
3. Select "My Themes"
3. Select Edit HTML/CSS
4. Using Command/CTRL + F, search for productdetails. Click on the ProductDetails.html file and paste in the code.
5. You have set up the review form widget. You now need to deactivate the in-built reviews in Bigcommerce.
Back in your Bigcommerce admin, click on Settings and select Comments
6. Click on Built-in and uncheck the Product reviews box