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.
CSV is a text-based file format used for storing tabular data, where each value is separated by a comma. It is commonly used for importing and exporting data between applications such as spreadsheets and databases. CSV files are simple and lightweight, making them easy to process and manipulate.