diff --git a/src/pr_lint/main.py b/src/pr_lint/main.py
index 59a752e..094a324 100644
--- a/src/pr_lint/main.py
+++ b/src/pr_lint/main.py
@@ -19,6 +19,15 @@
 
 
 def extract_emoji(string: str) -> set[str]:
+    """
+    Extracts emojis from a string
+
+    Args:
+        string: The string to extract emojis from
+
+    Returns:
+        A set of emojis
+    """
     return set(emoji_pattern.findall(string))