How can you quickly save changes in an Excel workbook?

Using the 'Save' shortcut (Ctrl + S) is the quickest way to save changes in an Excel workbook. When you press this keyboard shortcut, Excel immediately saves the current state of your workbook without requiring any additional input from you. This action not only preserves all modifications you've made since the last save but also helps maintain your workflow without interruption.

The convenience of this shortcut is especially beneficial during extensive data entry or analysis, as it allows users to quickly ensure that their work is secure. Practicing this habit frequently can help minimize the risk of losing unsaved changes due to unexpected software crashes or other technical issues.

In contrast, the 'Save As' option is used when you want to create a new version of the file or save it under a different name or format, which takes more time and involves additional steps. Closing and reopening the workbook does not save changes but merely refreshes the application, while exporting the document is intended for transferring the workbook to a different file format or location, which again does not equate to simply saving changes made. Thus, for rapid saving, the shortcut stands out as the most efficient method.