AiTrillion allows you to show reviews in a group.
Step 1. Login to AiTrillion
Step 2. Go to Product Reviews > Display Reviews > Group Product Reviews.
Step 3. You now need to create a group using product handles. To do this, click on the add product handle button. If you do not know how to get product handles, learn more here.
Step 4. Once you have added your choice of handles, give the group a name and save it.
The created rule will be listed below. You can edit or delete that rule.