[1] Highlight standout journalism - ニュース ヘルプ ( 版) <https://support.google.com/news/publisher/answer/191283>
For example, if you wanted to highlight an exclusive, breaking story from The Example Times, you would implement the following code on that story's page:
<head>
...
<link rel="standout"
href="http://www.example.com/breaking_exclusive_story_2314"/>
</head>
Or, you could use a meta tag:
<head>
...
<meta name="standout"
content="http://www.example.com/breaking_exclusive_story_2314"/>
</head>