The main method that the World Bank uses in its efforts to reduce global poverty is the lending of money. The bank lends money only to developing countries and the goal of those loans is to reduce poverty.
The World Bank lends money both to governments and to private development projects. It lends money to governments to help them get out of debt with other countries and to help them do things like creating programs that will help poor people. It lends money to big private projects if the projects are meant to create large numbers of jobs and to help the people of the country (rather than projects that will mainly be used to make money for foreign companies).
Through this lending, the World Bank tries to reduce poverty.