diff --git a/docs/cmdline-opts/etag-save.md b/docs/cmdline-opts/etag-save.md
index 237b5dc548..137a4d5a55 100644
--- a/docs/cmdline-opts/etag-save.md
+++ b/docs/cmdline-opts/etag-save.md
@@ -21,5 +21,10 @@ usually returned in a response. Use this option with a single URL only.
 
 If no ETag is sent by the server, an empty file is created.
 
+In many situations you want to use an existing etag in the request to avoid
+downloading the same resource again but also save the new etag if it has
+indeed changed, by using both etag options --etag-save and --etag-compare with
+the same filename, in the same command line.
+
 Starting in curl 8.12.0, using the --create-dirs option can also create
 missing directory components for the path provided in --etag-save.