Exclusion rules prevent customers from taking advantage of unintended synergy among your promotions by letting you specify promotions that can never be combined with the current promotion. For example, if a promotion offers 25% off all soccer equipment, you might want to specify that another promotion, which offers 10% off all items in your catalog, cannot be combined with it.
Keep the following in mind when you create exclusion rules for a promotion:
Excluded promotions must have a lower priority than the promotion that is excluding them.
Use caution when excluding promotions, to prevent confusion as to exactly when promotions apply.
Excluded promotion must be of the same type as the promotion that is excluding them. For example, you cannot exclude a shipping promotion from an item discount.
To select promotions to exclude from the current promotion:
On a promotion’s details page, click Exclusion Rules.
Click the Edit button next to the Promotions to Exclude box.
Select a promotion from the list. You can filter the list by typing or pasting some text in the Promotions box.
The filter control matches letters or numbers that you type, wherever they appear in the name or ID, not just at the beginning. Usually, as you type more characters, there are fewer matches. When you see the item you want, select it.
The list contains only promotions of the same type as the current promotion. For example, if the current promotion is a shipping discount promotion, you can select only other shipping discount promotions to exclude.
Click Add Selected.
Click Done when you finish adding promotions to exclude.