This will only apply to the Site that you are in. If there are other SharePoint Sites, you'll need to replicate your actions.

This guide provides step-by-step instructions for editing navigation links in SharePoint. It covers removing, moving, and adding links, as well as important considerations such as concise display names and choosing whether the link should open in a new tab. If you want to efficiently manage the navigation links in your SharePoint site, this guide is for you.