If you keep up with the latest web design trends, you must heard about responsive and adaptive web design. We all use sites built on both of those popular design/dev principles, but may not feel the difference between them. When it comes to develop a site by/for your own, you should get a clear understanding on responsive and adaptive web design. It matters because the mobile web is boosting and those small screens require sites fit to their sizes. This is where responsive and adaptive designs come to the game.