The document lists the top 50 U.S. designated market areas (DMAs) by population, breaking them into four groups: - The top 3 DMAs are New York, Los Angeles, and Chicago. - DMAs 4-10 include major cities like Philadelphia, San Francisco, Dallas, and Boston. - DMAs 11-20 cover Phoenix, Seattle, Detroit, and others. - DMAs 21-50 and 51+ cover smaller population centers.