Culture refers to the learned norms, values, attitudes and beliefs of a group of people. Cultural diversity can provide competitive advantages for companies but also risks cultural collisions if companies fail to consider cultural differences or make needed adjustments. Cultures form and change through social situations that provide new alternatives, or through cultural imperialism and diffusion. Behavioral practices like social stratification, work motivation, relationship preferences, risk tolerance, and information processing differ across cultures and can impact business. Companies must consider factors like power distance, individualism vs collectivism, uncertainty avoidance, and communication styles when operating across cultures to avoid culture shock and effectively institute change.