It will import the ready made widget to the site. It helps you to reduce the designing period of the website.
While you import the demo data, it fetches the media files necessary for posts and pages of the demo site.
There are many ready made pages which are necessary for a website. It will import these pages. You just have to edit with your content.
Plugin will import some demo post content so as to fullfil the website with demo content (posts).
Advanced Import will import all the settings of the customizer and also options setting of plugins.
You have option of importing either posts only, pages only, or products only.
It will import Taxonomies (Categories, Tags) settings.
It will import Metadata (posts, users, comments).
Advanced Import is designed specially for EASY, EFFECTIVE and FAST demo data import for WordPress. It can also be used for migration purpose.