This document defines key terms related to labour migration such as migration, emigration, immigration, and labour migration. It provides statistics on the number of international migrants in 2010 (214 million, half being migrant workers) and discusses trends such as the feminization of migration and top migration routes. Factors driving migration from countries of origin and the impact of migrant workers on labour markets in destination countries are examined. The document also explores remittances, finding they are the 2nd largest source of funding for developing countries, totaling $406 billion in 2012.