What is Folder Group Extraction and when do I use it?

As part of Group Extraction, Folder Group Extraction allows you to collect web data from multiple pages that require a login. As you know, you can simply extract data from multiple public pages using Group Extraction, but private pages require one more step of logging into a website. Without a login, a private website does not allow anyone or any services to access it. Therefore, you may need to collect each web page and then group them into a folder to download using Folder Group Extraction.