A (good) fully managed host will take care of everything for you, if you want you can even ask them to do mundane tasks like add a new domain or set up wordpress.
Unmanaged: if you don't know anything about server admin then you may be able to stumble your way through things with cpanel or similar, but what happens if something goes wrong?
(I have no bias either way, just pointing out that if the shit hits the fan you may have trouble getting help to fix it at an unmanaged host.)
|