Member or Editor?
Editor, or project member is someone you invite to a specific project. You can invite an unlimited number of editors to your project.
Team member is someone you invite to your team and is able to manage projects, invite other members, and more. Team members are available on the Team plan and are charged per seat.
An editor can also be kept to the text: on the Team plan a project member can be set as a Copywriter — see Copywriter mode. They write the content of the pages and the SEO fields, and the sitemap itself stays as the editors left it.