Mainstream media like Vogue and Cosmopolitan appeal to large audiences with their coverage of popular topics like fashion, beauty, and celebrities. They use techniques like camera angles that portray power and confidence to attract readers. Niche media have smaller audiences focused on more specialized interests, like smooth jazz magazines using dark lighting and costumes to set a moody atmosphere for that music genre. The document contrasts the broad popular appeal and techniques of mainstream media versus niche media with smaller, targeted audiences.