Google has clarified that the snippets it presents within the Google Search results primarily come from the content on the page and not from structured data or your meta descriptions. Google updated its snippets control help document to clarify this language.
What Google said. Google explained that it “Clarified in our documentation about snippets that the primary source of the snippet is the page content itself.” “The previous wording incorrectly implied that structured data and the meta description HTML element are the primary sources for snippets,” Google wrote.