Microsoft Excel is a component of MS Office used to enter, analyze, and present quantitative data. It uses a spreadsheet format laid out in a grid of rows and columns. Excel is commonly used in business for tasks like budgeting, inventory management, and decision making. The Excel window interface includes elements like the ribbon, tabs, quick access toolbar, worksheet, formula bar, and status bar that allow the user to navigate, enter data and formulas, and view information. Formulas in Excel use operators to calculate and return values based on cell data.