Google launched Googlebot-Mobile for smartphones back in December 2011 with the task of identifying smart-phone optimized content. The content crawled by smartphone Googlebot-Mobile will be used primarily to improve the user experience on mobile search. Interestingly, Google also came up with recommendations which we are summarising here as follows:
When building a website that targets smartphones, Google supports three different configurations:
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. This is Google’s recommended configuration.
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 a separate mobile and desktop sites.
From above we see that yes Responsive website design is what is on top of Google's recommendations. Many websites are adapting to needs of the hour and if you would want to discuss migration of your website to CMS Driven website based on Responsive Design then email us