Global marketing involves focusing a company's resources and objectives on global market opportunities. Companies engage in global marketing to take advantage of growth opportunities and to survive. There are advantages like cost reduction through economies of scale and improved quality from uniform products. However, there are also limitations such as cultural differences between markets and lack of global orientation. Industries become more globalized due to common customer needs, cost factors, government policies, and competitive pressures. Mergers and acquisitions allow companies to enter new markets, increase market share and resources, but can fail due to cultural clashes or paying too much for acquisitions.