diff --git a/src/main/java/stirling/software/SPDF/controller/api/UserController.java b/src/main/java/stirling/software/SPDF/controller/api/UserController.java
index c1abbb605..aa4ae9a00 100644
--- a/src/main/java/stirling/software/SPDF/controller/api/UserController.java
+++ b/src/main/java/stirling/software/SPDF/controller/api/UserController.java
@@ -167,6 +167,21 @@ public class UserController {
 
     @PreAuthorize("!hasAuthority('ROLE_DEMO_USER')")
     @PostMapping("/updateUserSettings")
+    /**
+     * Updates the user settings based on the provided JSON payload.
+     *
+     * @param updates A map containing the settings to update. The expected structure is:
+     *                <ul>
+     *                  <li><b>emailNotifications</b> (optional): "true" or "false" - Enable or disable email notifications.</li>
+     *                  <li><b>theme</b> (optional): "light" or "dark" - Set the user's preferred theme.</li>
+     *                  <li><b>language</b> (optional): A string representing the preferred language (e.g., "en", "fr").</li>
+     *                </ul>
+     *                Keys not listed above will be ignored.
+     * @param principal The currently authenticated user.
+     * @return A redirect string to the account page after updating the settings.
+     * @throws SQLException If a database error occurs.
+     * @throws UnsupportedProviderException If the operation is not supported for the user's provider.
+     */
     public String updateUserSettings(@RequestBody Map<String, String> updates, Principal principal)
             throws SQLException, UnsupportedProviderException {
         log.debug("Processed updates: {}", updates);