Advanced Excel refers to the proficient use of Microsoft Excel, a powerful spreadsheet software. It involves mastering complex functions, formulas, and data analysis techniques to manipulate, visualize, and interpret data effectively. Advanced users can create dynamic dashboards, pivot tables, and macros for automation. They're skilled in handling large datasets, performing advanced calculations, and using features like Power Query and Power Pivot. Additionally, they can create custom functions and utilize VBA (Visual Basic for Applications) for advanced automation and customization. Advanced Excel skills are invaluable for business analytics, financial modeling, and decision-making processes in various industries.