Most of the information about the workspace owner is managed from the Workspace Settings page. From here, you can manage things like workspace members, workspace name, connected accounts, and location information. Any workspace member can manage Workspace Settings on behalf of the owner. This information also appears in Personalized Suggested Smart Posts. 

To get to your Workspace Settings, click your profile picture in the upper right of the screen, then click Workspace Settings. Click Modify to update your information on any of the tabs.