noun
tray
TRAY/treɪ/
A flat, shallow container for holding or carrying items.
The shallow tray holds a cup and plate within its raised rim.

Etymology
The Old English ancestor already named a flat wooden board with a low rim. The modern meaning preserves that basic shape and carrying function without requiring the object to be wooden.
In context
functionally it serves as a place to hold some books a tray for our keys and plenty of storage space to keep all our shoes organized