The document discusses how to build Debian packages. It covers the basics of Debian packaging including what packages are, why the Debian distribution uses the .deb package format, and the basic components of a Debian package. It then outlines the steps for building a package, including using tools like dh_make and cdbs to generate the package files and structure, and dpkg-buildpackage to build the binary package. It emphasizes quality control and following Debian policies. It concludes with information on contributing packages to Debian through mentors.debian.net and becoming a Debian Developer.