PB Media can use both quantitative and qualitative audience research methods to better understand their target audience for a new magazine. Quantitative research using surveys can provide insights into audience size and demographics, while qualitative focus groups can provide more detailed feedback on content preferences. The document also discusses various audience segmentation approaches PB Media could use, such as psychographics to classify personalities, geodemographics to target neighborhoods, and niche vs mainstream markets. Choosing the right segmentation approach and research methods will help PB Media design a magazine that appeals to their target readers.