Maintaining software documentation is crucial for several reasons. Firstly, it serves as a knowledge repository that facilitates the understanding of software systems for new developers and stakeholders. This aids in troubleshooting, maintenance, and future enhancements. Proper documentation also enables consistent collaboration among teams, ensuring everyone is aligned on system functionality and design choices. Furthermore, comprehensive documentation supports compliance with regulatory standards and can simplify onboarding processes. Without it, the risk of miscommunication and system vulnerabilities increases, hindering both development efficiency and project success.