60% of Korean words are derived from Chinese loan words. Learning to read and write Chinese characters is not necessary for most Korean students given that they are used infrequently in modern Korean texts but learning the sound and meaning of the characters will help you improve your vocabulary similar to how students of English can benefit from learning Latin and Greek roots.

익힐 습, 거듭 습, practice; flapping wings (11)
見習 견습 apprentice
慣習 관습 custom, convention
復習 복습 review
復習 복습하다 review (conjugate verb)
習慣 습관 custom
習慣 습관 habit
習俗 습속 folkways
習字 습자 penmanship
實習 실습 actual training, practice
惡習 악습 vice
演習 연습 exercise
練習 연습 practice
練習 연습 practice, exercise
練習 연습하다 exercise (conjugate verb)
練習 연습하다 practice (conjugate verb)
練習 연습하다 rehearse (conjugate verb)
練習- 연습하다 to practice, exercise (conjugate verb)
豫習 예습 preparation of lessons
豫習- 예습하다 to review, prepare lessons, rehearse (conjugate verb)
因習 인습 tradition
風習 풍습 custom
學習 학습 learning, education