As mentioned in the previous chapter, the sharded cluster balancer continuously manages the distribution of documents into chunks and chunks into shards. The goal of the balancer is to ensure an even distribution of data between servers in the sharded cluster. It's extremely important to note that, for the most part, it's best to let the balancer do its job. However, situations may arise where you wish to manually intervene in this distribution process by managing the size of chunks, splitting chunks, and manually migrating chunks between shards. In such cases, you need to know how to manage the balancer (https://docs.mongodb.com/manual/tutorial/manage-sharded-cluster-balancer/#manage-sharded-cluster-balancer).
The first consideration is to determine the state of the balancer.
