Globalization refers to the growing interdependence and integration of economies, societies, and cultures around the world through cross-border trade and investment, technology, and flows of information. It began accelerating in the late 20th century due to advances in transportation and communication technology. Globalization has led to both opportunities like reduced poverty and expanded economic growth, as well as challenges like increased inequality and the loss of local culture and jobs in some countries. It involves the opening of borders to flows of goods, services, finance, people and ideas across countries.