diff --git a/sorts/bubble_sort.py b/sorts/bubble_sort.py
index 9ec3d5384f38..be486871b627 100644
--- a/sorts/bubble_sort.py
+++ b/sorts/bubble_sort.py
@@ -107,8 +107,13 @@ def bubble_sort_recursive(collection: list[Any]) -> list[Any]:
 
 
 if __name__ == "__main__":
+    # doctest is a Python module used for testing your code automatically.
     import doctest
+
+    # sample : It picks unique random items from a list, set, or sequence.
     from random import sample
+
+    # timeit is used to measure how long a piece of code takes to run.
     from timeit import timeit
 
     doctest.testmod()