Google have recently announced they will soon change the algorithms they use to determine a websites mobile page rank. These changes will penalise webmasters who have not properly considered the increasing legions of mobile users.
Google’s recommendations consist of three officially supported configurations
- Sites that dynamically serve all devices on the same set of URLs, but each URL serves different HTML (and CSS) depending on whether the user agent is a desktop or a mobile device.
- Sites that have separate mobile and desktop URLs.
- Sites that use responsive web design, i.e. sites that serve all devices on the same set of URLs, with each URL serving the same HTML to all devices and using just CSS to change how the page is rendered on the device.
All 3 configurations are equally valid. This blog post summarises the important considerations to optimise for end users and search engines.