In Topol PRO, a saved section is something a colleague created that you can reuse, and a synced section is something the whole team shares as one piece. Edit it in one template, and PRO updates every other template that uses it, including those that nobody has open.
What keeps this from going wrong is the section lock. Once a synced section is locked, it cannot be accidentally rewritten. Unlocking it for an edit is a separate, deliberate step, and once confirmed, the change applies to every template.