Having a quality user experience can be critical to the success of a business. But many marketers often underestimate the role that website performance plays in the user experience.
Nowhere is this truer than on mobile, where a slow-loading or poor-performing webpage can lose a user’s attention and interest within seconds.
Unlike desktop websites, mobile websites are typically accessed on the go, and in situations where people don’t have a lot of time or inclination to sit around waiting for a website to load.
https://www.econsultancy.com/blog/70130-travel-and-telco-the-worst-performing-industries-for-ux-ahead-of-google-s-mobile-update/