Domain backorder is a service offered by ICANN-authorized providers and it's the most effective way to acquire a good domain name that was owned by some third party and was left to expire. When the registration period of a domain is over, the latter becomes inactive, but is not removed immediately. Instead, the owner has 2 months to renew it. If this doesn't happen, the domain enters a deletion period that continues about 5 days and next it is deleted, so anybody could register it. The backorder service will help you to make an order for such a domain with a registrar company and they'll make an effort to register it automatically the moment it is offered. This way, you'll be able to get a short and eye-catching domain name for your website and although such domains are registered on a first -come, first-serve basis and there is no warranty that you will get the desired domain, using an automated system will provide you with a much better chance than if you keep checking whether the domain is deleted and try to acquire it personally.