Eclipse help says:
Synchronized Both copies of the application files on the server and in the workbench are matching.
Republished The copy of the application files on the workbench has changed and does not match the copy on the server. The server needs to be updated.
Eclipse help says:
Synchronized Both copies of the application files on the server and in the workbench are matching.
Republished The copy of the application files on the workbench has changed and does not match the copy on the server. The server needs to be updated.
I think it is a good idea to follow this.