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HI, What Erica said is correct.  You can use 3rd party services to help you with changing contents, links, images and etc. on the website based on many factors such as location, browser, technology and even behavior on the site.  You can use Adobe, Qubit, Monetate and many many other services in this area. Feel free to message me for more detail as I'm currently using one of these services. Thank you!

Here is something that comes from this article that confuses me. http://www.seroundtable.com/mobile-sites-google-sitemaps-12709.html Yes, with "mobile" we mean the traditional mobile phone browsers, not smart-phones (which we generally treat the same as desktop browsers given their advanced capabilities). Using special CSS/HTML templates for smart-phones would be fine and would not require submitting them via mobile Sitemap. It keeps things a bit easier if you want to focus on smart-phones, but there are still a gigantic number of more traditional phones with limited internet browsing capabilities out there :-). Based on this we don't need Mobile sitemap for Smartphone sites. Its only needed for traditional mobile sites.