1、Go to your Online store - Theme - Find the Theme that you're using - Action - Edit Code.
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2. Search for product.liquid file (or product-template.liquid in some cases).
3. Then, find the following code line (A):
{{ product.title }}
4. Copy this code snippet (B):
<div class="shopify-super-collection-review" product-id="{{product.id}}"></div>
Insert the code snippet (B) under the above code line (A):
P/S: product.liquid or product-template.liquid can be named differently due to variety of themes.
NOTE: If it doesn't work, please free to contact our Support team via Online Message.