After a study series in Job, that’s indeed an important question to answer. Thankfully Christopher Ash does in the end of his commentary.

“TOO OFTEN WE COME TO the book of Job (as to other parts of the Bible) expecting answers to our questions, and especially to questions about suffering. The main human character certainly suffers, but the book of Job is not fundamentally about suffering. Job suffers because he is a believer, and he suffers as a believer. And because he is a suffering believer the central character and subject of the book of Job is not Job who suffers but about the God with whom he has to deal. The book of Job is about God. This ought not to surprise us, but it is easy to forget. If we take our eye off the central focus and major instead on suffering, we will be disappointed, for we do not find in Job the answers to the questions we have chosen to pose. 

Instead we find what Job found when he ultimately had to listen to God: God asks him questions more than Job poses puzzlers to God. And this turns the tables, as they must be turned. The book of Job is not about Job but about God-his character, sovereignty, justice, goodness and, yes, even his love. above all it is about God the Creator of everything, the One who is God, who made everything, even the wildest corners of the created order. He is the God who made and who entirely controls the Leviathan, the Satan, the beast and monster who seeks to destroy Job. Even this hideous monster is God’s monster, God’s creature.

And therefore Job is about true worship, about our bowing down in reality and in darkness to the One who is God, leaving even our most agonized answers unanswered questions at his feet, for we are creatures, and he alone is the Creator.”

Christopher Ash, Job: The Wisdom of the Cross (Preaching the Word)(Crossway, 2014), 435.