Tamriel is a continent filled with diverse and ancient cultures. There are human civilizations such as the Imperials of Cyrodiil or the Redguards of Hammerfell, vigorous Elven nations such as the Wood Elves of Valenwood or the Dark Elves of Morrowind, and countries of Beastfolk like the reptilian Argonians of Black Marsh and the catlike Khajiit of Elsweyr.
Your adventurer’s cultural origin comes with some stat or skill benefits. However, it is the training choices you make during play that truly come to define their capabilities, including how you advance and balance their stats and skills.