Diageo is a global spirits and beer company formed through mergers in 1997. It focuses on premium brands and has a diverse portfolio including Johnnie Walker, Smirnoff, Guinness, and others. Diageo uses acquisitions, geographic segmentation, complete category participation, and priority brand marketing to grow globally. It targets high-growth markets and categories. Diageo tailors its marketing strategies to different regions, emphasizing sponsorship and relationships in North America and sports in Australia.