index: Detail what is shown in gnome-tour

help/C/index.page

@@ -50,9 +50,9 @@
   <section id="gnome-tour">
     <title>New Welcome Tour</title>
     <p>GNOME 3.38 comes with a new <app>Welcome</app> tour, shown at first
-    login, after the initial setup. The tour primarily provides onboarding for
-    new users, but it also serves to give a nice welcome to users in their
-    first session.</p>
+    login, after the initial setup. The tour primarily highlights the main
+    functionality of the Shell, giving first time users a nice welcome to
+    GNOME.</p>
     <media type="image" src="figures/welcome-tour.png">Welcome tour</media>
     <p>The <app>Welcome</app> tour is written in Rust.</p>
   </section>