Meaning of it in English
1. a thing, situation, person, or idea that the sentence is about
"Is this your book?" "Yes, it is."
2. used when you are talking about time, dates, the weather, distance etc., used with the verb “be
It is raining today.
3. used as the subject or object of a sentence when the real subject or object is later in the sentence
It is very difficult to learn Arabic.