diff --git a/grafana-tidb-dashboard.md b/grafana-tidb-dashboard.md
index df189fdb2d205..29bbe3538d0dd 100644
--- a/grafana-tidb-dashboard.md
+++ b/grafana-tidb-dashboard.md
@@ -128,7 +128,7 @@ To understand the key metrics displayed on the TiDB dashboard, check the followi
     - Owner Handle Syncer Duration: the time that it takes the DDL Owner to update, obtain, and check the Schema Version
     - Update Self Version Duration: the time consumed by updating the version information of Schema Version Syncer
     - DDL OPM: the number of DDL executions per second
-    - DDL Add Index Progress In Percentage: the progress of adding an index
+    - DDL backfill progress in percentage: the progress of backfilling DDL tasks
 
 - Statistics
     - Auto Analyze Duration 95: the time consumed by automatic `ANALYZE`