diff --git a/packages/block-library/src/site-tagline/block.json b/packages/block-library/src/site-tagline/block.json
index 1ba1803d8e2bdf..607c649ba57c69 100644
--- a/packages/block-library/src/site-tagline/block.json
+++ b/packages/block-library/src/site-tagline/block.json
@@ -3,7 +3,7 @@
 	"name": "core/site-tagline",
 	"title": "Site Tagline",
 	"category": "design",
-	"description": "In a few words, what this site is about.",
+	"description": "Describe in a few words what the website is about. The tagline can be used in search results or when sharing on social networks even if it's not displayed in the theme design.",
 	"keywords": [ "description" ],
 	"textdomain": "default",
 	"attributes": {