Migration refers to the movement of people between locations to live or work. There are two types of migration - voluntary and forced. Voluntary migration occurs when people choose to move to places with better economic opportunities or quality of life, while forced migration happens when people are compelled to relocate due to issues like wars or natural disasters. Countries experience benefits and drawbacks from both emigration, where their citizens leave, and immigration, where foreign citizens enter. Benefits include economic gains from remittances or filling jobs locals don't want, while drawbacks involve fewer taxpayers or pressures on housing and social services.