With users browsing on mobile devices, it is essential to keep the adaptability to available screen resolutions in mind from the start of the design process. This means both designers and developers focus more and more on dynamic design. So far, this focus has mainly been on the technical side and how to display the design optimally on different devices.
More information: https://www.mirabeau.nl/en/news/artikel/2014/content-first-from-responsive-design-to-a-dynamic-website