Google blog:

Featured Snippets are algorithmically generated highlights of what’s available on the web that provide quick, relevant answers for your queries. Today, we’ve added more images and related searches inside select Featured Snippets to help you learn even more about your topic, or to discover new things related to your interest.

If you use Google for search, you’ve no doubt encountered Featured Snippets, a block of info at the very top of your search results, often with exactly the info you need.

Two interesting reads:

• Here’s a link to Google’s Featured Snippets help page.
• Here’s a link to the Google blog post discussing the evolution of Featured Snippets and Knowledge Panels.