Labels help consumers make choices in regard to the climate impacts of the products they buy.
Clear, easy-to-understand labeling of household applications such as washing machines and other goods is thought to empower consumers to choose low carbon products. This regards the production of a product.
Energy input labeling describes how much energy was used to produce a product.
Wikipedia definition (similar term):
A label (as distinct from signage) is a piece of paper, polymer, cloth, metal, or other material affixed to a container or product, on which is written or printed information about the product. Information printed directly on a container or article can also be considered labeling. Labels have many uses, including providing information on a product's origin, use, shelf-life and disposal, some or all of which may be governed by legislation such as that for food in the UK or USA. Methods of production and attachment to packaging are many and various and may also be subject to internationally recognised standards.
Source: Wikipedia - Label