The internet has over 3 billion users, with more than half of them exclusively using mobile phones to access it. It's a crowded space, which makes it crucially important that a website stands out from the crowd with a great user experience and flow of information.
Investing in a great user experience up front makes business sense. It's been shown that a change in UX design can be up to 100 times more expensive after a site is developed, and the increase in sales of more than 60% with great designs is worth the extra time.
Have a look at this infographic from PointSource;