Build automation is the process of using software tools to automatically compile, test, and package code into executable applications. This practice helps developers streamline their workflow, reduce manual errors, and ensure consistent builds. By automating these tasks, teams can focus more on writing code and less on repetitive processes. Common tools used for build automation include Apache Maven, Gradle, and Jenkins. These tools can manage dependencies, run tests, and deploy applications, making it easier to maintain code quality and integrate changes. Overall, build automation enhances productivity and accelerates the software development lifecycle.