IIRC the initial setup process of an iOS device walks you through this step by step. I don't remember doing any of these steps when I signed into Messages on OS

IIRC the initial setup process of an iOS device walks you through this step by step. I don't remember doing any of these steps when I signed into Messages on OSX. This article seems to be more for the people who skipped associating an e-mail address with their iMessages settings the first time around?