UPDATE ADD-ONS
As a website owner, the security and maintenance of your website is your responsibility. However, the website host is responsible for the security and maintenance of their servers. Like an apartment building superintendent, shared hosting providers are responsible for making sure the building (server) is up to code and the exterior fence locks (global firewalls). Websites are tenants in this high-speed high rise and are expected to lock their own doors and windows to prevent intruders.