The particle "를" is used in the Korean language to indicate the object of a verb. It is attached to nouns that end in a consonant, while "을" is used for nouns ending in a vowel. For example, in the sentence "사과를 먹다" (to eat an apple), "사과" (apple) is the object receiving the action of eating. In addition to its grammatical function, "를" helps clarify the relationship between the subject and the action in a sentence. This particle is essential for constructing clear and coherent sentences in Korean, making it easier for speakers to convey their thoughts effectively.