In League Of Legends there are six different roles:
The ADC ( The one who is supposed to do the most damage).
The Support ( The one who supports the ADC in the laning phase).
The Jungler ( The one who farms the jungle and ganks other lanes).
The Solo top ( The one who is supposed to become a tank and stun everyone).
The Solo mid ( The one who deals a lot of damage through ability power).
The Feeder ( The one who fucks up the game for everyone).