What do historians mean when they say that to be successful in the 19th century Indians had to become anglicized?

Historians suggest that during the 19th century, particularly under British colonial rule, Indians who aspired to succeed in various spheres—such as education, government, and business—often needed to adopt British customs, language, and social norms, a process referred to as "anglicization." This transformation was seen as essential for gaining access to opportunities that were predominantly available to those who conformed to British expectations. Consequently, many Indians believed that embracing Western values and practices would enable them to elevate their social status and navigate the colonial system more effectively. However, this also sparked debates about cultural identity and the impact of colonialism on indigenous traditions.