A combine enables you to use the results of multiple conditions and generate a yes/no item that can be used for conditional formatting or to determine whether a notification should be delivered. You can decide the result to be true when any, all, or none of the conditions are true. You can use the results of other combines to create complex logic. For example, if you want a notification to trigger when either condition 1 or 2 is true and either condition 3 or 4 is true.