Treehouse is an online web education tool that not only provides paid for learning but also shares a lot of tips and explanations around all things web. In this article they go through the difference between fixed, fluid, adaptive and responsive design in this informative, if not a little corny, video.
As a web designer, it’s important to embrace that your website is going to look different in various browsers and on different devices.
Focus on making your website change layout to match the device that your visitors are viewing it on.
Here’s the difference between different types of web design and layouts:An excerpt from What's the Difference Between Fixed, Fluid, Adaptive, and Responsive Web Design?