Yes, solving previous years' papers of UPSC Management optional subject can help in improving your understanding of business ethics and corporate governance concepts. Here's how:

1. Familiarity with Exam Pattern:
Solving previous years' papers will make you familiar with the pattern and structure of the exam. It will help you understand the types of questions asked and the level of difficulty.

2. Identifying Important Topics:
Analyzing the previous years' papers will give you an idea about the important topics and concepts that are frequently asked in the exam. This will help you prioritize your preparation and focus on the areas that are more likely to be covered.

3. Reinforcing Concepts:
By solving the papers, you will revise and reinforce the concepts of business ethics and corporate governance. This will enhance your understanding of these subjects and help you retain the information for a longer period.

4. Time Management:
Solving previous years' papers under timed conditions will improve your time management skills. It will enable you to develop a strategy to allocate time to different sections of the exam, ensuring that you complete the paper within the given time frame.

5. Exposure to Different Questions:
The previous years' papers will expose you to a wide range of questions, covering various aspects of business ethics and corporate governance. This will broaden your knowledge and understanding of the subject, helping you tackle different types of questions effectively.

6. Self-Assessment:
Solving the papers will allow you to assess your own performance and identify your strengths and weaknesses. This self-assessment will help you focus on the areas where you need improvement and devise a targeted study plan accordingly.

7. Building Confidence:
Regularly solving previous years' papers and scoring well on them will boost your confidence for the actual exam. It will familiarize you with the exam environment, reducing anxiety and improving your performance on the day of the exam.

By following these points and regularly practicing with previous years' papers, you can significantly improve your understanding of business ethics and corporate governance concepts, enhancing your chances of success in the UPSC Management optional subject exam.