Which term describes the advertisement that may not specify a sale, dates, or locations?

The term that describes an advertisement that may not specify a sale, dates, or locations is "trolling." In the context of marketing, trolling refers to a technique where information is shared to attract attention or engage potential customers without providing specific details that would typically define a sale, such as times or locations. This approach can create curiosity and prompt interested parties to seek more information.

Other options focus on different aspects of advertising or marketing. Solicitation usually implies a direct request or call to action, aiming to encourage a specific response or purchase, which contrasts with the vague nature of trolling. Classification involves arranging items or information into categories, which does not relate directly to the lack of specifics in an advertisement. Promotion generally indicates a broader strategy to inform or encourage interest about specific products or events, which again relies on some level of detail that is not present in a trolling approach.