Use the following recommendations to make your site easier to view on mobile devices:
For sites that use adaptive web design, use <meta name="viewport" content="width=device-width, initial-scale=1"> to define the viewing area for content. For more information, see Using HTML tags.
For site pages that have a mobile version, specify the URL. For example, you can use the link element:
<link rel="alternate" media="only screen and (max-width: 640px)" href="http://m.example.com/page.html"/>
Don't use Flash, Silverlight, or Applet technologies on pages that are intended for mobile users. These technologies aren't necessarily supported on mobile devices.