SpotBugs is an open-source static analysis tool designed to detect bugs in Java programs. It is a successor to the FindBugs project and offers advanced capabilities for identifying potential security vulnerabilities, performance issues, and other code defects. It integrates seamlessly with various build tools and continuous integration systems, making it a popular choice for developers looking to improve code quality through automated analysis. The tool is particularly adept at identifying common Java coding errors and provides detailed reports to help developers address these issues efficiently.