WebHTTrack is a graphical user interface (GUI) tool that facilitates copying websites for offline use or archival purposes. It offers features such as copying entire websites, selecting specific files to copy, and setting of download limits to manage bandwidth usage. However, WebHTTrack is less customizable than HTTrack, lacking some advanced customization options. To use WebHTTrack in Kali Linux, type "webhttrack" in the terminal to launch the application or access it via the Kali Linux menu in the top left corner of the screen. Then, specify the website URL you want to copy and adjust the copy settings according to your needs.