The 'North' and the 'South' Most richer countries are in the northern parts of the world.
Many poor countries are to the South.
So the 'North' is used sometimes to mean rich and developed countries. And the 'South' is used to mean poorer and less developed countries. Usually there is a low level of technological development and a low standard of living. Majority World Countries are the poorer and less developed countries where most people of the world live. Which countries are developed and which are developing can be different depending on what criteria are applied.