The Mozilla Public License (MPL) is a copyleft open-source license primarily used for software distribution. It permits users to freely use, modify, and distribute software, including incorporating it into proprietary projects. Unlike the GPL, the MPL does not mandate that derivative works be distributed under the same license terms. However, modifications to MPL-licensed code must be made publicly available. This license emphasizes compatibility with other open-source licenses and encourages collaboration among developers. It provides a clear legal framework for sharing and building upon software while offering some protections against patent litigation. The MPL fosters innovation and community engagement in software development.