A key component for a functional My Site implementation is the My Site host. As mentioned in the next section, “High-Level Steps Required to Create a New User Profile Service Application,” one of the steps involves specifying the My Site host. So, before starting that process, a My Site host needs to be in place.
Creating a new My Site host may not be required. These steps are for administrators who know they need to perform these steps because no My Site host was created by the Installation Wizard, or My Site and the User Profile Service aren’t operating properly, or for administrators who want the experience of creating a new My Site host.