What gets produced. How much trade should take place between and among nations. Advocates of socialism acknowledge the major benefits of capitalism, but believe that wealth should be more evenly distributed. Socialism became the economic platform from countries such as Holland, Sweden, and France. Socialist nations rely heavily on government to provide education, health care, retirement, and care for those not able to work.
Socialism creates more equality, but it takes away some work incentives.
Socialism did not create the jobs or the wealth that capitalism did. The marketplace largely determines what goods and services get produced, who gets them, and how the economy grows. The government largely decides what goods and services will be produced, who'll get them, and how the economy will grow. Socialism and communism didn't create enough jobs or wealth to keep economies growing fast enough. No country is purely capitalist or purely capitalist, rather some mix of the two systems.