diff --git a/main.go b/main.go
index 4572f68..e9d90bd 100644
--- a/main.go
+++ b/main.go
@@ -148,6 +148,7 @@ func createLoggerWithLevel(level slog.Level) *slog.Logger {
 	}))
 }
 
+// updateFieldIfChanged ensures that meter readings that haven't been updated aren't written to the database, in order to save storage space.
 func updateFieldIfChanged(currentValue *int, previousValue *int) (*int, bool) {
 	if currentValue != nil && *currentValue == *previousValue {
 		return nil, false // No change