Index: src/wp-admin/includes/media.php
===================================================================
--- src/wp-admin/includes/media.php	(revision 52013)
+++ src/wp-admin/includes/media.php	(working copy)
@@ -3228,7 +3228,7 @@
 
 		printf(
 			/* translators: 1: Link to tutorial, 2: Additional link attributes, 3: Accessibility text. */
-			__( '<a href="%1$s" %2$s>Describe the purpose of the image%3$s</a>. Leave empty if the image is purely decorative.' ),
+			__( '<a href="%1$s" %2$s>Learn how to describe the purpose of the image%3$s</a>. Leave empty if the image is purely decorative.' ),
 			esc_url( 'https://www.w3.org/WAI/tutorials/images/decision-tree' ),
 			'target="_blank" rel="noopener"',
 			sprintf(
Index: src/wp-includes/media-template.php
===================================================================
--- src/wp-includes/media-template.php	(revision 52013)
+++ src/wp-includes/media-template.php	(working copy)
@@ -158,7 +158,7 @@
 
 	$alt_text_description = sprintf(
 		/* translators: 1: Link to tutorial, 2: Additional link attributes, 3: Accessibility text. */
-		__( '<a href="%1$s" %2$s>Describe the purpose of the image%3$s</a>. Leave empty if the image is purely decorative.' ),
+		__( '<a href="%1$s" %2$s>Learn how to describe the purpose of the image%3$s</a>. Leave empty if the image is purely decorative.' ),
 		esc_url( 'https://www.w3.org/WAI/tutorials/images/decision-tree' ),
 		'target="_blank" rel="noopener"',
 		sprintf(