Not necessarily. Google prefers websites that offer an excellent user experience for mobile users. While responsive design is an efficient way to begin achieving that goal is is not the only option.nnWhat you should know is that, unlike just a few years ago, Google does frown on separate mobile-only sites. They want to see a single site that offers a great experience for everyone, no matter what device they are browsing from, one that offers the same seamless experience for a user that accesses it from their desktop at home in the morning and then again from their smartphone at lunch.