XLSM is a spreadsheet file format used by Microsoft Excel that supports macros and advanced features. It is similar to XLSX but includes the ability to automate tasks and perform complex calculations through embedded macros. XLSM files are commonly used in business and financial analysis.
XLSX is a more modern version of the XLS format used by Microsoft Excel. It stores spreadsheet data in an open XML format, offering better file compression and compatibility. XLSX files support complex formulas, charts, and formatting options, and they are widely used for business and financial data analysis.