How text under navbar like this?

Hi there,

Since it's right below the header, a hook element or header element should both work:

Hooks:
https://docs.generatepress.com/article/hooks-element-overview/
https://docs.generatepress.com/article/hooks-visual-guide/

Header:
https://docs.generatepress.com/article/header-element-overview/

Can you help me a bit more about this pls.

Are you using a header element on that page?

If not then start with creating a header element and add the sentence as the content.

This guide shows you how to create one step by step:
https://docs.generatepress.com/article/how-to-create-a-page-hero/