The site header is the information at the very top of the site. It appears on all pages. The header often includes your logo and menu.
The only time you will need to make changes here is if you change your slogan or logo.*
To update the site header, navigate to the word appearance on the left menu on the back end of your WordPress site. Hold your cursor over the word to allow the menu to appear. Click the word Widgets.
Once on the widgets page, look to the area on the right of your screen. Tabs such as Footer Setup, Home Slide Show, Sidebar right, etc. will be visible. Click on the word Header Setup to open the drop down. Click on the word Layout Builder and then the button titled Open Builder. At this point, the area will look similar to the creation and building of a page.