The most important principle for web pages that are fully responsive consists of content that is concise and straightforward with short sentences and clear calls-to-action. When developing a responsive website, it's also important to make sure the navigation is intuitive and easy to find without any pinching or zooming involved. You'll want your navigation sections similar in size on all devices as well, but not too big that they take up too much space and aren't easily found. As we stated above, one of the most important things with responsive design is constantly updating your content in order to stay current when browsers stop supporting old or deprecated browser design techniques!
To ensure functionality, height and width of the page across both desktop and mobile devices must be considered. If your device doesn't load your websites properly, you will have to scroll up and down as well as left and right, this is extremely counterintuitive. When your site has images loading on it, they shouldn't cause a shift in layout or make the website look cropped. The images on the website should be flexible so that they look good when they are resized to fit narrower screens. This is one of the reasons why responsive web design is important, because many people don't consider needing flexible images that will render differently for a desktop & a mobile device.