DOCSP-33660 Fix Balancer and Even Chunk Distribution Text (#5083)

* DOCSP-33660 Fix Balancer and Even Chunk Distribution Text

* title

* nit

* external feedback

Author: ajhuh-mdb

source/sharding.txt

@@ -169,17 +169,16 @@ MongoDB partitions sharded data into :term:`chunks<chunk>`. Each
 chunk has an inclusive lower and exclusive upper range based on the
 :term:`shard key`.
 
-Balancer and Even Chunk Distribution
-------------------------------------
+Balancer and Even Data Distribution
+-----------------------------------
 
-In an attempt to achieve an even distribution of chunks across all
-shards in the cluster, a :ref:`balancer
-<sharding-balancing>` runs in the background to
-migrate :term:`chunks<chunk>` across the :term:`shards<shard>` .
+In an attempt to achieve an even distribution of data across all
+shards in the cluster, a :ref:`balancer <sharding-balancing>` runs in the 
+background to migrate :term:`ranges <range>` across the :term:`shards <shard>`.
 
 .. seealso::
 
-   :doc:`/core/sharding-data-partitioning`
+   :ref:`sharding-range-migration`
 
 Advantages of Sharding
 ----------------------