What were the main ways that the Romans improved the country after they had arrived?

The Romans significantly improved the regions they conquered through the establishment of advanced infrastructure, such as roads, aqueducts, and urban planning, which facilitated trade and communication. They introduced governance systems, legal frameworks, and tax reforms that helped stabilize and organize local economies. Additionally, Roman culture, including architecture, language, and public health measures, enriched the social fabric of these areas, contributing to long-term development.