How to use HNS domains?

Could you please explain, in simple terms, how exactly one goes about utilizing HNS domains? I've heard they're a unique and innovative way to navigate the blockchain space, but I'm unsure of the specific steps involved in setting one up and making use of it. Are there any prerequisites or special tools required? And what kind of benefits or advantages does having an HNS domain offer compared to traditional domain names or other blockchain-based alternatives?