World Ranking FIFA is ranking of all world national teams. It's based on results in all official matches (including friendly matches) in last four years. Ranking determines seeding in qualification of FIFA World Cup and FIFA World Cup group stage. It's calculated every month, but because most of the editions are not used for any seeding, you can see only the December editions (and of course the editions used for FIFA World Cup seeding). For actual ranking visit official FIFA Ranking page.