Hold and Fetch within the realm of 3ds Max Design is used for placing a timestamp "Hold" in your scene, which can be retrieved "Fetch" at a later point down the road in your scene. This includes cameras, lighting, viewport configs, geometry and selections sets.
You can only Hold/Fetch to one point in your scene, and if you Hold for a new point your previous Hold is lost. Hold is a useful tool when exploring different design ideas or work that may not be saved. Be advised Fetch dumps all operations in the Undo/Redo history list.
See a short video on Hold/Fetch in action: Hold-Fetch