Final answer:
If the extension (.zip) is displayed when you rename a compressed folder, it means your computer is configured to display file name extensions. Do not remove the extension as it could result in being unable to access the compressed folder. You can change the setting to display or hide file name extensions in the View tab.
Step-by-step explanation:
If the extension (.zip) is displayed when you rename a compressed folder, it indicates that your computer is configured to display file name extensions. It is important not to remove the extension (.zip) as doing so may result in being unable to access the compressed folder until you restore the extension. To display or hide file name extensions, you can click the 'File name extensions' check box in the View tab under the Show/hide group.