DMR Codeplugs
Codeplugs are not anything mysterious or magical.

A DMR codeplug is just a digital file that contains the settings/information for the radio to work, it contains the settings for the radio, the universal contacts list, Channels, list of TalkGroups that you want to us, and the Zones to help you organize the channels, etc.

Things needed to setup a codeplug.
See the DMR How To section for details on how to actually put the codeplug together.