Mention internet router dns

webadmin/EN/help_pihole.html

@@ -127,7 +127,9 @@
 
     <p class="helptext" translate="yes">Set your DNS IP address to the one shown and many ads will get blocked even before they're delivered to your laptop or mobile device. This can save a lot of bandwidth and generally speed up the loading of websites.</p>
 
-    <p class="helptext" translate="yes">On a GNU/Linux system the easiest way to set your DNS is:</p>
+    <p class="helptext" translate="yes">If your internet router allows you to change the DNS IP address then this is the best way to use pihole because it will then provide coverage for all of the devices and computers in your home.</p>
+
+    <p class="helptext" translate="yes">If you can't change your internet router's DNS then you can do that on individual GNU/Linux systems as follows:</p>
 
     <p class="codetext" translate="yes">
       sudo chattr -i /etc/resolv.conf<br>