CPack is a packaging tool that is part of the CMake software suite. It simplifies the process of creating installation packages for software projects, allowing developers to distribute their applications easily across different platforms. CPack supports various package formats, including RPM, DEB, and NSIS, making it versatile for different operating systems. Using CPack, developers can define package properties in their CMake configuration files, which streamlines the build and installation process. This tool is particularly useful for automating the creation of installers, ensuring that all necessary files and dependencies are included in the final package.