Add help text

src/lib/registration/dialogs/online_search.rb

@@ -72,6 +72,16 @@ def back_button
         ""
       end
 
+      # @macro seeDialog
+      def help
+        _("The online search feature allows the user to search for packages accross all " \
+          "modules and extensions including those that have not been activated for this " \
+          "system. Once the wanted package is found, the user can select it for " \
+          "installation. If it belongs to not activated module, YaST will allow to activate " \
+          "the module. Bear in mind that the activation of the required modules/extensions" \
+          "will take place at the end, after the user clicks the Next button.")
+      end
+
     private
 
       # Package search widget