What is GDP per capita, what are two advantages and disadvantages of using it to measure and compare development?

GDP per capita is the gross domestic product of a country, as divided equally between each citizen (capita)Advantage - represents a country's economic productivity and the advancement of its industryAdvantage - easy to rank and measureDisadvantage - doesn't include the contributions of the informal economy (70% in African cities)Disadvantage - can hide inequalities within a nation (e.g. China's developed east and poor west)