[Written in 2014 – this section remains valid today in 2020] Web analytics for most public facing website will confirm that the majority of website visitors are using mobile devices. Applying mobile-first principles to responsive web design will lead to a ‘mobile friendly’ user experience and is now generally regarded as good practice.
Responsive CMS platforms use ‘css media queries’ to change styles on the fly, based on the characteristics of the target device (hight, width, type etc). The outcome is that the web-pages fluidly adapt to the size of the screen. This enables developers to create one set of templates that will cover all platforms. It also means that producers can create one set of content which is automatically repositioned. Mobile visitors now form the majority of the traffic for most websites, so the trend is now to apply ‘mobile first’ principles to website design and content creation.