2013 was predicted (by Mashable) to be the year that Responsive Website Design would become a top trend in the digital world. The prediction was not wrong. Since 2010 there has been a huge rise in the amount of smartphones purchased each year.
Online companies decided that they had to jump on board and evolve their websites with the digital age. Following the footsteps and trends of the millennials, the internet went responsive, and so began the booming Responsive Web Design (RWD) trend.
Now in 2016 it has become a necessity to have a mobile responsive website. Front-end developers have developed their skills so intensely that they can now create magical things with HTML and CSS. Things that the average person on the street takes for granted on a daily basis.
Responsive Web Design can be a cost effective alternative to having a .mobi for your website. Back in the day, larger companies would have a .mobi for their "mobile" audience to view their website. Now it's as simple as having one website to do it all.
At the end of the day, every company wants to attract more of an audience to their website. The only way that you will keep them there is by giving them a great user experience. Don't ask them to swipe left and right for no reason!