When you import the data, the following things might happen:

• No existing posts, pages, categories, images, custom post types or any other data will be deleted or modified.
• Posts, pages, images, widgets, menus and other theme settings will get imported.
• Please click on the Import button only once and wait, it can take a couple of minutes.

Make sure all required plugin are install properly and activated after you can process this action. You can choose page builder and import dummy content.

• Goto Appearance : Import Demo Data.
• Start Import Demo content process.
• Import Demo Content is Done!