Refer to your Excel sheet and go through the menu, such as File, Home, Insert Page Layout, Formulas, Data, Review and View. Write a summary of the functions of each of these tabs available in the menu.

Sure, here is a brief summary of the functions of each of these tabs in Excel:

1. File: This tab allows you to access basic file management features such as New, Open, Save, Save As, Print, Share, Export, and Close. It also provides access to Excel's options window.

2. Home: This is where you can find the most frequently used options such as copy, paste, formatting cells, changing fonts, and sorting and filtering data.

3. Insert: This tab allows you to insert various elements into your spreadsheet. This includes tables, pictures, charts, forms, symbols, and more.

4. Page Layout: This tab provides options for adjusting the layout of your page. You can change themes, setup page margins, orientation, size, print areas, breaks, background, and align your data.

5. Formulas: This tab is where you can insert and manage formulas. It provides a library of functions, formula auditing tools, calculation options, and more.

6. Data: This tab provides tools for importing external data, sorting and filtering data, data validation, and other data tools.

7. Review: This tab provides tools for proofing, language, comments, and protection. You can check spelling, add and review comments, and protect your sheet or workbook.

8. View: This tab provides options for changing the view of your workbook. You can switch between normal, page layout, and page break preview. You can also show or hide gridlines, headings, formula bar, and more.