It also means that production moves to the places that offer the best conditions for producing the relevant goods or services. It is important to understand that globalisation is not a zero-sum game where we just share the existing production opportunities.
If each country produces what it is relatively best at, overall output, and thus real income, increases, compared with a situation where all countries try to be self-sufficient. In the transition process there will always be people who lose their jobs or companies. Not surprisingly, they are against these changes.