In the Featured Product section, Shopify store owners can draw attention to products on the homepage, product, or collections page, either to boost sales or offer customers something special.
Showing how the product is rated by others gives the next customer confidence in their purchase.
How to Add Rating Stars to the Featured Product
In Shopify admin, under Online Store, click on Themes.
Select your theme and click on Customize.
Click on the Featured Product section.
Click on Add block.
Click on the Product Rating block.
Click Save to apply the changes.