This document discusses various methods for researching audiences, including quantitative, qualitative, and demographic research. Quantitative research uses surveys to determine the size of an audience. Qualitative research collects information on audience interests through focus groups, interviews, and questionnaires. Demographic factors analyzed include age, gender, socioeconomic status, and psychographics like lifestyle and location. Understanding these audience characteristics helps media companies create content that appeals to specific target audiences. The challenges are that some methods may not capture accurate information or certain groups may be excluded.