Why are domain names more useful to businesses than fixed IP addresses?
If all websites relied on solely their IP addresses, most people would likely forget them somewhere between hearing about the website and actually getting around to viewing it. By utilizing words and not just numbers, people are far more likely to remember website and actually visit them when they need/want to. As well, if people want to look into a business, they can easily just type some version of their name into a web browser rather than waste time attempting to discover their IP address.