Nowadays, more and more people access your website via smartphones, tablets, iPhones and iPods. If the theme on which your website is built doesn’t allow it to resize to fit the screen on which it is viewed, then there are possibilities that the viewer will switchover to some other website that looks well on his device. This will ultimately led to sudden drop in web traffic. If your site has considerable number of mobile user then it is of the utmost important that your site provides seamless viewing experience to all users irrespective of the device used for viewing. One way of making your website responsive and adaptive is to develop it on Bootstrap CSS framework.