What it does: Groups related products together (using tags) and applies volume discounts based on the total quantity in each group.

How it works:

1. Grouping products - Choose how items stack together:

   • By product variant: Each specific variant must reach the threshold individually (e.g., 5x "Blue T-shirt Size M")

   • By product parent: All variants of the same product count together (e.g., any combination of sizes/colors of the same T-shirt style)

2. Checking quantities: The system counts items in each group and checks against your threshold settings (e.g., 3 items = 10% off, 5 items = 15% off)

3. Applying discounts: When a threshold is reached, ALL items in that group get the discount

Example:

Customer buys:

• 2 blue T-shirts (size M)

• 3 blue T-shirts (size L)

Grouped by product parent (threshold: 5 items = 10% off) ✓ All 5 T-shirts get 10% off (different sizes count together)

Grouped by product variant (threshold: 5 items = 10% off) ✗ No discount applied (neither size M nor size L reached 5 items individually