The term “mobile-first” was coined by Eric Schmidt, while the idea of designing a website specifically for mobile users was put forward by “Luke Wroblewski.” Mobile-first design means designing the website for mobile devices first and then scaling it upward to fit the larger screens – it’s a progressive advancement. So that makes it exactly opposite to the design principle of responsive websites, which is also known as graceful degradation. Mobile-first website focuses on the useful elements that will provide value to your target audience and thereby removing unnecessary clutter that is not relevant. Many companies are using the mobile-first design approach. For example, Instagram started with the mobile-first approach by first designing an Instagram app using mobile phones and then scaling it up to a desktop version. You can only make a post through the app through and the desktop version only allows for browsing.