Today many activities have been simplified and your client has got used to the interfaces that are clear, nice and responsive. If your site is not, you may be out of the game.
On my first day in work as a intern web developer, I was extremely excited and even a bit stressed. The people around were very friendly though, some of them instantly offered assistance in case I need something.
But who is UX designer and UI designer really? Recently, you probably notice these two positions more often.