I've come across this article about Testing Domains and I don't understand why this is useful at all... Why does this differ from using localhost ? Can you give me a concrete example, because in the article it is not clear to me.
Is this different than using Apache's Virtual Host? Does it require less configuration?
UPDATE : I am not a server expert or anything like that, so please don't enter too much in the technical details. I am a web developper, and I am having problems testing multiple websites on my local machine. I feel that this would solve my problem, but I don't understand how I can use it to my benefit! Currently I use Apache's Virtual Host and it is doing well. I want to know how a testing domain like localtest.me is good/better than my current practice.