Migration is when people decide to move from one place or country to another. Economic results of migration are the effects that these movements of people have on the economy.
A positive economic result of migration might be that people moving to a new country bring new skills and knowledge, which can help to boost the economy. For example, if people come from a different country with strong technology skills, they can teach local people how to use the latest technology to improve their businesses.
A negative economic result of migration could be that too many people come to a country and the economy can't keep up. For example, if a lot of people move to a small country, it can put a strain on things like housing and jobs, making it hard for everyone to find a place to live and earn a living.
Overall, migration can have both good and bad economic results.