Pallets, skids, and crates are all types of flat structures used for shipping and storing materials. They are often made of wood, but can also be made of other materials such as plastic or metal.

A pallet is typically a low-profile platform with a top deck and bottom deck that is used to support goods in a stable manner while they are being moved by a forklift, pallet jack, or other material handling equipment. Pallets are often used in warehouses, manufacturing facilities, and distribution centers.

A skid is similar to a pallet, but it typically only has a top deck and no bottom deck. Skids are used for transportation and storage of materials and goods, and are often used for heavy loads.

A crate is a box-like structure that is typically used for shipping or storing fragile or irregularly-shaped items. Crates are often made of wood, but can also be made of other materials. They have a lid or a door to close and protect the content.

In summary, Pallets are used for stacking, skids are used for heavy items and crates are used for protecting fragile or irregular items during transportation or storage.

Here are the differences explained