Grammar is the set of rules that govern how words are used and combined to form sentences in a language. It helps us understand the structure of sentences, including how to use nouns, verbs, adjectives, and other parts of speech correctly. Good grammar ensures clear communication and helps convey meaning effectively. In addition to rules about word order and sentence structure, grammar also includes punctuation, which helps clarify meaning. For example, commas, periods, and question marks guide readers in understanding the tone and intent of a sentence. Mastering grammar is essential for writing and speaking well in any language.