New articles into WHAT'S NEW section of the Frontpage

After I publish new article into the new category this article doesn't appear at WHAT'S NEW section of the main page?
What should I do to show new publications at WHAT'S NEW section of the main page?

Hi,

Please check your Appearance -> Customize -> Frontpage section and
"Filter Frontpage Categories" option - here you can specify which categories of posts will be displayed under What's New section.

Thank you!