Here you will learn how to display an announcement message on your store
Step-by-Step Guide
Login to your administration panel admin.yourwebsiteaddress.com
Click "Main Menu"
Click "Settings"
Select the Website Announcement tab in the Manage Storefront Settings section
Create the message and then click the Active checkbox located at the bottom of the page.
Select "Update Global Message."
To remove the message unclick Active.
This can be used for important messages, store closings, or other information relevant to the customers. Make sure not to leave a message up once its time has passed to avoid confusion!