The term "complex products" refers to items that are composed of multiple components or features, and may require a high level of expertise or knowledge to understand and use effectively. These products can be technical in nature, such as software programs or electronic devices, or they could be more tangible goods with intricate designs or functions, like machinery or specialized equipment. In either case, the complexity of these products often requires extensive testing, documentation, and support services to ensure their proper functioning and safe use by consumers.