In order for Microsoft Copilot to  work faster in Excel and provide results that are more in line with user expectations, it is now possible to define a set of rules that Copilot will  apply when creating calculations, formatting tables and charts, as well as other tasks. This is where Rules comes in, a new feature that allows you to standardize the way Copilot processes and displays data. Combined with Skills, which expand its capabilities, Excel reporting becomes more accurate and efficient.