According to the ILO global estimates on migrant workers, in 2013, migrant workers accounted for 150 million of the world’s approximately 232 million international migrants. Migrant workers contribute to growth and development in their countries of destination, while countries of origin greatly benefit from their remittances and the skills acquired during their migration experience. Yet, the migration process implies complex challenges in terms of governance, migrant workers' protection, migration and development linkages, and international cooperation. The ILO works to forge policies to maximize the benefits of labour migration for all those involved.