Ubuntu server offers several advantages for businesses including low costs, strong performance without GUIs slowing things down, and high customizability. It has a strong presence in web and DNS applications. Ubuntu works well with OpenStack for building private clouds and with Ceph for scalable, fault-tolerant storage. Tools like MAAS, Juju, and Landscape make managing large Ubuntu server environments easy. Major companies use Ubuntu server for these benefits and strong community and professional support is available.