diff --git a/backup-docker-to-local.py b/backup-docker-to-local.py
index 5ba55e1..fa051f8 100644
--- a/backup-docker-to-local.py
+++ b/backup-docker-to-local.py
@@ -66,7 +66,22 @@ BACKUP_TIME = datetime.now().strftime("%Y%m%d%H%M%S")
 VERSION_DIR = create_version_directory()
 
 def get_instance(container):
+    # The function is defined to take one parameter, 'container', 
+    # which is expected to be a string.
+
+    # This line uses regular expressions to split the 'container' string.
+    # 're.split' is a method that divides a string into a list, based on the occurrences of a pattern.
     instance_name = re.split("(_|-)(database|db|postgres)", container)[0]
+    # The pattern "(_|-)(database|db|postgres)" is explained as follows:
+    #    - "(_|-)": Matches an underscore '_' or a hyphen '-'.
+    #    - "(database|db|postgres)": Matches one of the strings "database", "db", or "postgres".
+    # So, this pattern will match segments like "_database", "-db", "_postgres", etc.
+    # For example, in "central-db", it matches "-db".
+
+    # After splitting, [0] is used to select the first element of the list resulting from the split.
+    # This element is the string portion before the matched pattern.
+    # For "central-db", the split results in ["central", "db"], and [0] selects "central".
+
     print(f"Extracted instance name: {instance_name}")
     return instance_name