Final answer:
Marketers use a customized segment to tailor strategies to local markets, which accounts for unique cultural, economic, and social differences country by country.
Step-by-step explanation:
When marketers focus on local segments that vary from country to country, they use a customized segment. This approach allows companies to tailor their marketing strategies to meet the specific needs and preferences of local markets. A customized marketing strategy takes into consideration various factors such as cultural, economic, and social differences that are unique to each country or region, providing a more targeted approach compared to universal strategies.