If you remember some words of a scriture and want to find that scripture in the Bible, look it up in the concordance.

If you're studying Moses, or Abraham, or David, or Isaiah, and want to find all the places that name is found in the Bible, look it up in the concordance.

If you're a Bible student, or a Pastor, or a Theologian, or a Sunday School teacher, or a parent, look up your subject in the concordance.