Go to WP Menu => Appearance => Customize => Click on Header => Above Header
In the above header you can edit text or add new text of topbar.
2. How do i add category for topbar?
Go to WP Menu > Header top bar
Click on Add new tab.
after click on Add new tab Add title and top bar content.
and Choose top bar category.
click to Publish.
3. How to Add Category for top bar header?
Go to WP Menu > Header top bar > top bar categories
here you can add categories for top bar header.
after create category.
Click to Publish.