Worked on improving the Databend Docs repository by addressing a documentation bug related to masking policy behavior. Focused on clarifying that the default column type for CREATE MASKING POLICY is nullable, ensuring the documentation accurately reflects that masking policy definitions allow null values by default. Used Markdown to update and review the relevant sections, aligning the documentation with the actual implementation and reducing potential confusion for users. Emphasized documentation accuracy to support onboarding for both developers and database administrators. Demonstrated attention to detail and a methodical approach to technical writing, leveraging documentation skills to enhance the clarity and usability of the project.