Contributed a comprehensive documentation overhaul for DAX and Power Query M functions in the MicrosoftDocs/query-docs repository, focusing on improving clarity and usability for developers and analysts. The work involved drafting new function definitions, adding practical examples, and writing explicit usage guidelines using Markdown to enhance onboarding and self-service capabilities. By updating API references and introducing cross-links, the documentation now offers improved navigability and supports faster time-to-insight in Power BI and data modeling workflows. The technical writing demonstrated attention to detail and a strong grasp of DAX and Power Query M, resulting in a more accessible and maintainable knowledge base.