- The document discusses the Simple Build Tool (sbt) and how it can be used to define Scala projects and their dependencies. - It describes the structure of sbt's build.sbt file which defines project settings, dependencies, and repositories. - Useful sbt plugins are mentioned like sbt-idea and sbteclipse to generate IDE project files, and sbt-assembly to build single JAR files. Common sbt tasks are also listed. - Integration of sbt projects with IntelliJ IDEA and Eclipse IDEs is covered, with IDEA having better support and integration with sbt than Eclipse.