> ## Documentation Index
> Fetch the complete documentation index at: https://discount.xrtotech.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Rule selection and discount combinations

> Distinguish first-match, maximum-savings, and multiple-discount selection inside a campaign from combinations with other promotion categories.

GoGoGo Discounts has two discount controls: rule selection within a campaign determines which rules participate, while combination settings determine which other discount categories may combine. Shopify checkout rules also affect the final result.

## Rules inside one campaign

| Selection mode | Behavior | Use when |
| - | - | - |
| 按顺序选择 (First match) | Takes the first qualifying rule in each category; drag to reorder | List order should set priority |
| 选择最优惠 (Maximum savings) | Selects the greatest savings in each category | Offers are alternatives |
| 使用多条折扣 (Use multiple discounts) | Eligible combinable product rules participate; order rules choose the best | Multiple product offers may participate |

For product rules of 5% and 20% on the same scope, first-match uses the first qualifying rule, while maximum-savings chooses the larger offer. “Use multiple discounts” does not mean every offer applies consecutively.

Automatic gift campaigns require the multiple-discount strategy. Gift-only campaigns hide selection controls that do not need manual configuration.

## Combining separate campaigns

In **使用限制 → 折扣叠加** (Usage limits → Discount combinations), choose:

* **可与订单折扣叠加**: combine with order discounts.
* **可与商品折扣叠加**: combine with product discounts.
* **可与运费折扣叠加**: combine with shipping discounts.

Check permission on both campaigns, not just one. Also inspect the other side when combining Shopify admin or third-party app promotions.

## 20% off followed by 5%

Combining a 20% product offer with a 5% order-category additional offer changes 100 to 80, then 76. It does not simply become 75. See [additional discounts](https://discount.xrtotech.com/en/features/additional-discount.md).

## Verify before launch

Test campaigns separately and record savings, then activate them together and check offer names, amounts, product allocations, and shipping. After reordering rules, test first-match behavior again.

If the expected combination is absent, pause unrelated promotions and follow [troubleshooting](https://discount.xrtotech.com/en/troubleshooting/discounts-not-working.md).


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