There are two main ways to add comments to cells in Excel, both user-friendly and allowing you to explain or provide additional information about specific data points:

Method 1: Using the Ribbon

1. Select the cell: Click on the cell you want to add a comment to.
2. Go to the Review tab: Navigate to the "Review" tab on the Excel ribbon.
3. Click New Comment: In the "Comments" section, locate the "New Comment" button and click on it. Alternatively, you can use the keyboard shortcut Shift+F2.
4. Type your comment: A yellow comment box will appear next to the cell. Here, you can type your explanation, notes, or reminders related to the data in that cell.
5. Click outside the cell (Optional): Clicking anywhere else on the worksheet will minimize the comment box, leaving a small red triangle in the upper right corner of the cell to indicate a comment exists.

Method 2: Using Right-click Menu

1. Select the cell: Click on the cell you want to add a comment to.
2. Right-click: Right-click on the selected cell.
3. Choose Insert Comment: A context menu will appear. Select "Insert Comment" from the list.
4. Type your comment: Similar to method 1, a comment box will appear. Enter your desired explanation or notes.
5. Click outside the cell (Optional): Clicking anywhere else on the worksheet will minimize the comment box, leaving the red triangle indicator.

Viewing and Editing Comments

- To view a comment again, simply hover your mouse over the cell with the red triangle. The comment box will reappear, displaying the text you entered.
- You can edit existing comments by clicking on the red triangle and making changes within the comment box.

Additional Tips

- By default, comments display the username of the person who created them. You can edit this by clicking inside the comment box and modifying the displayed name.
- Comments are hidden when you print your spreadsheet. However, you can choose to include them during printing through the Page Setup options.
- Explore the "Review" tab further to find options for formatting comments, deleting comments, and finding specific comments within your worksheet.