My Workspace is your personal area in SubGrade. It brings together the pages you use most often to manage your day, your records, and the things waiting on you.

From here you reach your Dashboard, My Work Log, My Profile, your tickets and training (My Qualifications), My HR File and My Notifications. Where they apply to you, you also have My Vehicle and My Subcontractor Work.
Workspaces with only the Trade Suite have My Profile and My Notifications, and the other pages here aren't part of that suite.