User Experience (UX) has been a massive industry over the last ten years. Researching what makes a user, click, buy, and generally engage with your site has the ability to determine its success, or imminent failure.
The question is: is UX a worthy investment for your own website pursuits? To help answer this question, User Testing has put together an infographic that helpfully depicts the data and the impact UX can have for sites of a wide variety.
(H/T: Hubspot)