Can I use the same section on several pages and edit it in one place?

Not at the moment. Each page keeps its own copy of its sections, so changing a section on one page doesn't change the others. There is also no button to copy a section or a whole page to a different page.

What you can do:

• Add the section on each page with + Add and set it up there. Using the same component keeps the pages looking alike.
• On a single page, use ⧉ (Duplicate section) to copy a section directly below the original, with all its settings.

For a message that must be on every page, such as a free shipping notice, the header or footer is usually a better place than a page section.