Proper test documentation is crucial for creating a systematic and repeatable testing process, fostering better communication within the team, and providing a foundation for future projects. It aids in knowledge sharing by quickly getting new developers up to speed on product areas they don't know much about, and it acts as a curated collection of functional insights that provides a holistic view of how a particular product segment is supposed to work. Consistency is also key, ensuring test cases are executed the same way each time, which promotes trust in the test cases and overall software. Additionally, test case documentation serves as a guide for writing future tests and a robust feedback mechanism for software engineering teams, offering insights into testing gaps and finding areas for improvement. To structure test documentation effectively, it should begin with stating the objective of the test, outline prerequisites or initial conditions, write down steps to execute a particular test, provide clear expected outcomes, detail clean-up steps, and use descriptive language to make it easy for developers to learn about features by reading all test cases. Maintaining test documentation is as crucial as creating it, requiring processes such as reviewing test documentation after each sprint or software release, defining clear roles and responsibilities, utilizing tools like version control systems and automation frameworks, and ensuring the product and test documentation are in sync through CI/CD pipelines.