"И" is a conjunction in the Russian language that translates to "and" in English. It is used to connect words, phrases, or clauses, indicating addition or a relationship between them. For example, in the phrase "кот и собака" (cat and dog), "и" links the two animals. In addition to its basic function, "И" can also be used to create lists or to combine ideas in sentences. It plays a crucial role in sentence structure, helping to convey more complex thoughts. Understanding how to use "и" effectively is essential for mastering Russian grammar.