Shopify Reviews App: Remove zero based ratings

This modification will hide the rating stars from for products that are not rated yet in grid view or collections view. 

Code:

/* -- code to remove zero based ratings for Shopify App -- */
.spr-badge[data-rating="0.0"] {
    visibility:hidden; display: none;
}
/* - end - */

Where do I add the code?

Use this link to learn where exactly to add this code snippet:

Where to add your CSS style code