A management pack is an XML-based file that contains definitions for classes, workflows, views, forms, and reports. You can use a management pack to do the following:

Using a management pack allows you to extend System Center Service Manager 2010 with the definitions and the information necessary to implement all or part of a service management process.

By default, the Service Manager installation folder contains several pre-imported management packs that enable core Service Manager features, such as incident management and change management.

Unsealed management packs that are included with Service Manager are not automatically upgradable in System Center Service Manager Authoring Tool.