What is a Google Featured Snippet?
A featured snippet, also called position zero, is the search listing that appears after ads and sponsored posts (depending on current SERP features) but above the first organic result. They are designed to give users a quick answer to their search query by providing more information than traditional search snippets.
An important point to note is that search engines pull information from websites to generate featured snippets. This is why you should know the SEO best practices that give you better chances of getting featured snippets on Google.