A three-step trolley, also called a three-tier trolley or cart, typically features three spacious shelves for organizing items, smooth-rolling wheels for mobility, a sturdy frame for durability, and an open design for quick access. Depending on the model, it may also include features like lockable castors for stability, ergonomic handles for easier maneuvering, or a durable, easy-to-clean surface like stainless steel or strong plastic and aluminum.