Which method is used to add a comment to a cell in Excel?

To add a comment to a cell in Excel, the method involving right-clicking the cell and selecting "Insert Comment" is effective because it provides a quick and intuitive way to access the comment feature. This method is commonly used because right-clicking opens a context menu that gives you various options for cell modification, with Insert Comment easily available.

In contrast, other methods may not be as straightforward or could involve more steps. For instance, accessing the Ribbon or the Review tab might require navigating through additional menus, potentially slowing down the process of adding comments. The keyboard shortcut involving the Alt key and C is not a standard way to insert comments, as Excel does not have a direct shortcut like this for that function. Thus, the right-click method stands out for its efficiency and ease of use.