Banchan are Korean side dishes that include all the dishes besides rice, soup and stews. Koreans typically consider Kimchi the most basic side dish that needs to be on the table at every meal. Then other banchans are often made to last more than a meal so you can plan meals based on these.
Kimchi, Namul, Jangjorim, Fish Jeon and Galbi Jjim are all good banchans.