HI @Julie07!
You can certainly send reviews for specific products as explained in this Help Center article here:
As reviews are submitted, they will automatically appear on your product pages through the reviews widgets.
There are many advantages to using the new Reviews app. Consolidation is probably the most prevalent, as it increases ease of use and allows for more powerful data use cases, like custom questions that can inform flows and segments, etc. Plus, the most common reason for bad reviews is wrong/late shipments, and using the Reviews app eliminates this as it’s embedded within the same e-commerce cycle.
I hope this helps to clarify, and thanks for using the Community!
- Brian