According to peer-reviewed research from the University of Chicago, ambient noise stimulates our creative cognition. Basically, it's better to work in a slightly noisy coffee shop than alone in a quiet room, where you slowly go mad.
On the web site, you can choose from three ambient sound loops, which recreate the background noise similar to what you might find in a coffee shop. (Or pay for other sounds, if you so choose).
There are also apps for Android and Apple if you want to stimulate your creative cognition on the go with your phone.