How do I move up from too much white space of the gap on mobile?

[AlexYZ_1]

[AlexYZ_1]

Website>kawaiibonjour.com

[infoatcodelab7]

@AlexYZ_1

Step 1: Go to Online Store->Theme->Edit code.

Step 2: Search file theme.css

Step 3: Paste the below code at bottom of the file → Save

@media(max-width:768px){
  .shopify-product-reviews-badge {
  display: none;
}
.grid-item.grid-product {
  margin-bottom: 0;
}
.grid-item__meta {
  margin-bottom: 0;
}
}

[AlexYZ_1]

Thanks!