In the green "ribbon" at the top of the Excel window, you'll see a series of tabs. Each of these tabs can be used to access different Excel tools; the main ones you'll need to know include the following:   Home — Contains options for formatting text, changing cell background color, and so on.  Insert — Contains options for tables, charts, graphs, and equations.  Page Layout — Contains options for page margins, orientation, and themes.  Formulas — Contains various formula options as well as a function menu. When adding data to a blank spreadsheet, you can use the top cell in each column (e.g., A1, B1, C1, etc.) as your column heading. This is helpful when creating graphs or tables which require labels. Click the cell into which you want to enter data. For example, if you're using a budget-planning template, you might click the first empty cell to select it. Type in whatever you want to add to the cell. Doing so adds it to the cell and moves your selection to the next available cell. To go back and edit data later, click the cell you want to edit, then change whatever you need to change in the text box above the top row of cells. If you want to change the way a cell's text is formatted (e.g., if you want to change it from money formatting to date formatting), click the Home tab, click the drop-down box at the top of the "Number" section, and click the type of formatting you want to use. You can also use conditional formatting to cause your cells to change based on factors in the spreadsheet (e.g., if a cell's value is below a certain number, the cell might turn red).

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Write a summary of the previous text in Vietnamese:
Làm quen với các thẻ ruy-băng trong Excel. Cân nhắc sử dụng các ô trên cùng làm đề mục. Chọn ô. Nhập văn bản. Nhấn ↵ Enter để thêm nội dung vào ô đã chọn và chuyển đến ô khả dụng tiếp theo. Chỉnh sửa dữ liệu của bạn. Định dạng văn bản nếu cần.