Job sharing
Many sites are operated by a team distributed between offices, companies or even countries. Because all the major tools have a web interface, participants can perform their task and view its results from anywhere with web access. And with a sensible CMS security model, you can be sure that only authorised people can perform authorised tasks.

Advance and refresh
You can specify dates and times for the content to go live and be archived or removed, along with the contents target audience segments.  If content is removed or archived, the CMS will ensure that the remaining content is still structurally consistent, without leaving orphaned links to the deleted asset.

No more accidents
With a CMS, it becomes very difficult for content assets to be on the site accidentally. Any updates must pass through commissioning, creation and one or more predefined signoff steps before the system will publish it. The resulting audit trail provides accountability for each action.

Speed to market
When you have a CMS, you suddenly have a tremendous advantage in the time it takes to react to market intelligence. You can write, edit and publish updates in a matter of minutes without suffering from "WebMaster Bottleneck".