簡單的說它是個輕量級的用於記錄和客戶的互動，包括INBOUND和OUTBOUND。 這些可以用ONE ORDER的ACTIVITY來記錄，但太重了。

See SAP幫助文件

The interaction object logs inbound or outbound customer contact.
Technically speaking, the interaction object is an entry in the contact tracking table that contains details about a customer contact but is not linked to the business transaction.

Interaction objects are usually generated in mass-marketing business to log customer contacts when the creation of activities is not desired. This improves performance and reduces unnecessary data volume. However, you still have a complete overview of which customer contact took place using which medium at any time, and can subsequently carry out reporting for your marketing activities.
You can also create follow-up transactions for interaction objects (for example, lead, opportunity) and display the entire transaction history related to the object.
Interaction objects are entered for both business partners and marketing prospects. During high-volume campaigns, you can create interaction objects for every business partner and marketing prospect contacted.
To create interaction objects for business partners and marketing prospects, you must activate the business function Social Media Integration in Marketing(CRM_SMI_MKT).

Integration

Marketing

Interaction objects are created during campaign execution if you have defined a communication method for which no activities are created (for example, e-mail without activities) for the communication medium. This means that no transaction type is maintained.

Applications

The interaction object is integrated with the contact history of activity management, account management, and the Interaction Center (IC) WebClient, as well as with the business partner fact sheet. You can search for the interaction object by using the locator search in activity management, the IC WebClient, the business partner fact sheet, and account management. The interaction object is identified by its own icon.
In the business partner fact sheet, the interaction objects are displayed in the lists Completed Activities and Last 20 Activities. By clicking on the transaction number you can view the interaction object details.