diff --git a/pandas/core/dtypes/dtypes.py b/pandas/core/dtypes/dtypes.py
index d8dd6441913b5..6be6787862654 100644
--- a/pandas/core/dtypes/dtypes.py
+++ b/pandas/core/dtypes/dtypes.py
@@ -161,6 +161,11 @@ class CategoricalDtype(PandasExtensionDtype, ExtensionDtype):
     """
     Type for categorical data with the categories and orderedness.
 
+    It is a dtype representation for categorical data, which allows users to define
+    a fixed set of values and optionally impose an ordering. This is particularly
+    useful for handling categorical variables efficiently, as it can significantly
+    reduce memory usage compared to using object dtypes.
+
     Parameters
     ----------
     categories : sequence, optional