Reference books, dictionaries, digital sources are usually say something like grammar is the structural foundation of our ability to express ourselves. Grammar is also known as the system of a language. Meanwhile, people sometimes describe grammar as the “rules” of a language. Languages started by people making sounds which evolved into words, phrases and sentences. No commonly-spoken language is fixed. All languages change over time. What we call "grammar" is simply a reflection of a language at a particular time.
Very many people in the world speak their own, native language without having studied its grammar. Children start to speak before they even know the word "grammar". But if you are serious about learning a foreign language, you need to study grammar. Grammar can help you to learn a language more quickly and more efficiently. When you understand the grammar of a language, you can understand many things yourself, without having to ask a teacher or look in a book.
Most of the people hate grammar and think it is the most boring part of learning a new language. However, we cannot run away from it because grammar constitutes the rules and framework, changing the form of words and joining them into sentences. If there are no rules, or if everybody follows their own rules, it creates problems in communication for everyone. So we can finalize grammar is an important factor to learn a new language.
