Negation in Korean grammar is an important aspect to understand for language learners. In Korean, there are specific grammar patterns used to negate verbs and adjectives by either using 아니다 (anida) or -지 않다 (-ji anta). This allows the speaker to clearly express a negative meaning, such as “not” or “do not.” Practicing with these types of sentences can help learners improve their skills in constructing negative expressions in Korean.