This task can be performed using Sitescarf
Seamless announcement banners
Best product for this task

Sitescarf
marketing
Create, schedule and synchronise announcement banners across multiple sites with one click.

What to expect from an ideal product
- Create a central banner that’s instantly reflected on all your websites.
- Schedule announcements to go live at the same time everywhere.
- Make changes in one place and see them updated across all your sites.
- Coordinate banner timing effortlessly, so every site is always current.
- Save time by managing banners from a single, easy-to-use interface.