Primary Header is a default Astra header. It will display a logo and a primary navigation menu. This header can be customized with the following options available in customizer under Header > Primary Header.
This setting will give three different positions for the logo in the header.
This allows you to set header width either to - full width or to the content width.
It will add a nice border at the bottom of the header. You can choose a width and color for this border.
On responsive devices, the menu converts into a hamburger. In the primary header, on responsive devices, only the logo and hamburger menu will display. You can manage the position of the logo with respect to the hamburger menu.
In case you have a big logo you can opt for Stack where hamburger will display below the logo. Else Inline menu and logo will look fine with a small logo.