Google has announced a new form of featured snippets aimed at showing you more useful aspects of the topic around your search. So, when you search for a query that triggers this new format, you will get a handful of expandable snippets below the main featured snippet with more information.
For example, if you search for [quartz vs. granite] you get the main featured snippet, with images, and then four additional featured snippets that can be expanded to show you ideas on costs, benefits, weight and durability. Another example: When you search for [emergency fund], you get the main featured snippet, followed by size, importance, savings account and purpose.
Here are some screen shots showing this off:
This is what it looks like when you expand one of the sub-featured snippets:
These new panels are automatically generated based on our understanding of these topics from content on the web, and we hope you find them useful as they roll out over the next few days.
This update is the latest in a series of improvements we’ve been making to help you get information quickly with Search. As always, if you have any feedback on the information you see, please let us know via the feedback link at the bottom of the search results page.
Here is another example: