Zukara WEB ページ編集拡張機能 is a browser add-on for Chrome that allows users to create, preview, and save "editing information" for the web pages they are viewing. This refers to the before and after differences that occur when users modify web pages using this extension.

The "editing information" created with this extension can be applied to websites by placing a script tag generated by the extension on the user's own site. This means that even without specialized knowledge in website updating, users can easily edit their own web pages.

It is important to note that this extension is part of the Zukara service, which provides a mechanism for easily editing web pages via script tags.