WordPress is a free and open-source content management system written in PHP and paired with a MySQL or MariaDB database. Features include a plugin architecture...
That depends on the service and the level of management specified in the offer. “Cloud” does not automatically mean the provider updates the operating system, configures server security or maintains your applications.
Before choosing, check who is responsible for updates, firewall configuration, monitoring, backups and restoration. Also ask which tasks the service covers and which need to be requested separately.
If you manage the server yourself, you will need technical knowledge or a server administrator. Even with a managed service, responsibility for WordPress, plugins and your website’s code should be explicitly agreed.