Circulation Verification Council (CVC) is an American company which acts as an auditor to create circulation data for various periodicals

Periodical publication

Periodical literature is a published work that appears in a new edition on a regular schedule. The most familiar examples are the newspaper, often published daily, or weekly; or the magazine, typically published weekly, monthly or as a quarterly...

. A common use of their services would be in providing demographic information about the readers of a publication so that the publishers and advertisers would be able to design content for the audience reading that specific publication.