"را" is a Persian preposition that translates to "to" or "for" in English. It is commonly used to indicate the direct object of a verb, helping to clarify the relationship between the action and the object in a sentence. For example, in the phrase "کتاب را می‌خوانم" (I read the book), "را" specifies that "کتاب" (the book) is the object being read. In Persian grammar, "را" is essential for sentence structure, especially in the context of transitive verbs. It helps to distinguish between subjects and objects, making sentences clearer. This preposition is often used in everyday conversation and writing, contributing to the fluidity of the Persian language.