a written statement of the goods and/or services in a trademark application. Every application must include an identification of goods and/or services. This listing of goods and/or services must have clear, concise, and definite terms (in other words, common commercial names and language that the general public easily understands).
The Acceptable Identification of Goods and Services Manual can be used to find IDs of goods/services that are acceptable in scope.
See also: Trademark Identification of Goods/Services.