See explanation below, and when you read "Subject ID" think "Customer ID".
Interaction historycomponents import the results stored in Interaction History for a subject ID. In theInteraction Historytab, use the filter settings to add time criteria, conditions based on Interaction History properties and specify the properties that should be retrieved. If you do not define any conditions or properties, the component retrieves all results for the subject ID. Defining criteria reduces the amount of information brought to the strategy by this component. Some properties are always retrieved by the interaction history component (for example, subject ID, fact ID and proposition identifier).