1. Overview of Debian Maintainer Tools
This section contains a rough overview of the tools available to maintainers. The following is by no means complete or definitive, but just a guide to some of the more popular tools.
Debian maintainer tools are meant to aid developers and free their time for critical tasks. As Larry Wall says, there’s more than one way to do it.
Some people prefer to use high-level package maintenance tools and some do not. Debian is officially agnostic on this issue; any tool that gets the job done is fine. Therefore, this section is not meant to stipulate to anyone which tools they should use or how they should go about their duties of maintainership. Nor is it meant to endorse any particular tool to the exclusion of a competing tool.
Most of the descriptions of these packages come from the actual package descriptions themselves. Further information can be found in the package documentation itself. You can also see more info with the command apt-cache show
package-name.