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# [New] Setting Up Add ons & Free gifts on the Mix and Match bundle

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This feature allows merchants to configure supplementary products—such as free gifts or discounted add-ons—that are offered to the customer independently of the primary bundle discount. These add-on products are presented to the customer in a dedicated, sequential step after the primary bundle products have been selected.

### Enabling the Feature
1. Navigate to the specific bundle configuration.
2. Open the **Build section**.
3. Select **Tools**.
4. Click on **Add ons and gifting**.
5. Enable the step using the toggle on the right-hand panel.

### Configuring the Step Appearance
1. **Name**: Assign a specific label for this step (e.g., "Choose your gift").
2. **Subtext**: Input optional subtext to provide instructions.
3. **Icon**: Modify the visual icon associated with this step.
4. Enable the **Add on section**.
5. **Title**: Assign a title that will display in the add-on area of the customer-facing interface.

### Defining Add-On Products and Eligibility
1. **Product Selection**: Manually select which products are eligible to be offered as part of this add-on step.
2. **Eligibility Rules**: Define the criteria the customer must meet within the primary bundle to unlock the add-on offer. The system evaluates the rule based on the state of the primary bundle.
    * **Rule Basis Option 1**: Number of products chosen in the bundle.
    * **Rule Basis Option 2**: Total value of the products chosen in the bundle.
3. **Discount Configuration**: Set the specific discount rate applied to the selected add-on products (e.g., 100% off for a free gift, or a custom percentage/fixed amount off).
4. **Messaging**: Customize the customer-facing messaging directly within this section to reflect the active rules.
5. Click **Save** to apply the configuration.

### Configuring Tiered Add-Ons and Selection Rules
The system supports multiple logic tiers for add-on eligibility, allowing merchants to dictate not only the discount, but the precise number of add-on products a customer can select per tier.
1. Configure the first tier's eligibility conditions (e.g., 1 item in the primary bundle triggers a 10% add-on discount).
2. Configure the **Selection Rule** within that specific tier By clicking on "Add tier rule" . This dictates the allowed quantity of add-on products the customer can choose. Available operators include:
    * **Exactly [X]**: The customer must select this exact number of add-ons.
    * **Less than [X]**: The customer can select any number of add-ons up to, but not including, this number.
3. Duplicate the tier to create additional logic steps.
4. Modify the eligibility rule, discount rate, and **Selection Rule** for the duplicated tier to create escalating rewards (e.g., 3 items in the primary bundle triggers a 100% add-on discount, with a Selection Rule of "Exactly 3").
5. Click **Save**.
**System Logic for Tiered Add-ons & Selection Rules:**
* **IF** the customer's primary bundle selection triggers a specific tier, **THEN** the system applies that tier's unique **Selection Rule** to the add-on step.
* **IF** a tier specifies a Selection Rule of "Exactly 1", **THEN** the system requires the customer to add exactly one add-on product.
* **IF** the customer's primary bundle triggers a higher tier, **THEN** the system dynamically overrides the previous tier's Selection Rule and applies the new tier's designated Selection Rule parameters.

## Constraints & Edge Cases
* **Independent Discounting**: Add-on discounts are calculated and applied separately from the main bundle discounts (e.g., a fixed price bundle). The add-on discount rate only applies to the specific products selected within the **Add ons and gifting** configuration.
* **Sequential UI**: The customer cannot add the gift or add-on to their cart from the primary bundle screen. They must satisfy the bundle requirements and click to the "next step" before the system presents the add-on products for selection.
* **Overlapping Tiers**: Ensure tier conditions do not conflict. The system relies on precise quantity or value thresholds to trigger the correct add-on discount.