Responsive site design varies the appearance of a site based on the size of the browser or device it is viewed on. Responsive sites reformat the content on a desktop site to accommodate the needs of mobile device users because the behavior of mobile device users is different than that of desktop users. Responsive sites not only meet Google’s standards for mobile sites, but they utilize their layout to appeal to mobile users. With today’s shifting landscape, many design teams have started to employ a “mobile-first” approach to designing websites, focusing on elements like conversion rate.