The main difference between unmanaged and managed virtual private servers is who is responsible for server administration.
With an unmanaged VPS, you are responsible for installing and maintaining any necessary software, managing user accounts, and ensuring that the server is secure.
With a managed VPS, you can leave all of these administrative tasks to the hosting provider. This can be a great option for users who are not familiar with server administration or do not have the time to manage their own server.