Build tools are essential applications in software development that automate the process of compiling source code, managing dependencies, and preparing software for deployment. They streamline various tasks, such as compiling code into executable programs, running automated tests, and packaging applications for distribution. By automating these repetitive processes, build tools enhance efficiency and productivity, allowing developers to focus on writing code rather than manual compilation. Popular build tools, such as Maven and Gradle, are widely used in different programming environments, particularly in Java development, to facilitate continuous integration and improve collaboration among development teams.