Certificates are required for building the apps for the different platforms. You obtain them, for example, when you enroll in Apple's iOS Developer Program, and to have to upload them to Mobile Administrator. See the following configuration topics for more detailed information:

Especially in large enterprises, where mobile applications are developed by multiple teams or external agencies, having your enterprise certificates managed by Mobile Administrator allows for a fine-grained configuration of who can deploy your mobile applications. Without Mobile Administrator, the enterprise certificates need to be shared with everyone who needs to perform deployment. With Mobile Administrator, enterprise certificates are managed centrally without giving direct access to the certificates to everyone.

To manage the developer certificates, you need the site-level permission Manage Site. See also Overview of Site-Level Permissions.