Interfaces are used to create business processes and/or process data necessary for various business procedures and/or to exchange data between applications. They are the link between the various applications, retrieving source material from one, processing it if necessary, and sending either the original data or the processed data to another application, making sure that the data formats are compatible and/or changing data formats when necessary, all this while maintaining the integrity of both source and target systems. The specific actions that the Interface performs depend on the applications. The interface manages the linkage schedule and actions. You can define the frequency of the linkage; whether to run it manually or automatically as well as several other related features.