Starter Content for Themes in WordPress 4.7

One of the hardest things for people setting up sites with WordPress for the first time is understanding what themes are and how a given theme can work for you, especially when there’s no content there to visualize. There are also significant gaps between local theme previews, screenshots, and .org previews. Even when there are easy-to-use site customization tools, it is difficult to figure out where to start and what things are going to be like. To help users along that path, 4.7 introduces the concept of “starter content” – theme-specific selections of content to help showcase a theme to users and serve as a starting point for further setup of new sites. Starter content works especially well in tandem with visible edit shortcuts, allowing users to not only see what content might work best where within a theme, but from there to be able to jump to building off of that base without having to initially spend time figuring out, say, which widgets areas map where.
How it works
Starter content is applied and displayed upon entering the customizer, with no changes appearing on the live site until customizer changes are explicitly saved and published. In 4.7, this
Source: https://managewp.org/articles/13928/starter-content-for-themes-in-wordpress-4-7

source https://williechiu40.wordpress.com/2016/12/01/starter-content-for-themes-in-wordpress-4-7/