Imagine this: you’re standing in line at your favorite coffee shop, waiting to get your morning caffeine. Then you remember that today is your turn to pick up lunch for the office. You take out your cellphone and search for your favorite, local restaurant. Once the site loads, you find that it is difficult to navigate—you are constantly scrolling up and down, left and right, to view the menu and find contact information. Frustrated, you decide to go with another option, and besides, by now it is your turn to order a morning latte.
Where did the restaurant fail? They did not have a responsive design for their website.