Excel 2019 Level 3 builds on the concepts and skills to provide advanced tools for solving real-world problems: lookup and decision-making functions, auditing and error-handling, array functions, date and text functions, importing and exporting, what-if analysis, and macros.
Excel 2019 Level 2 provides more advanced tools for analysis and presentation of complex, realistic data: how to manage complex workbooks, build more complex functions, use data analysis tools, make an impact with powerful chart and presentation features.
Excel 2019 Level 1 provides the basic concepts and skills students need to start being productive with Microsoft Excel 2019: how to create, save, share, and print worksheets that contain various kinds of calculations and formatting.
Word 2019 Level 3 covers advanced skills: advanced formatting features, document management, references, data fields and sources, macros, and forms.