For those who don't know, expired domain names are fast turning out to be a effective source for possible internet targeted traffic and earnings. There are actually different tools on-line which will guide you tap into the vast potential of domain names that have expired and are now out there for you buy a domain. What precisely are expired domain names? These are domains that used to be listed under another owner. Having said that, the owners of those expired domains could have offered up their domains due to various motives - some common causes being a non-renewal of the domain just after their registration contracts have expired either due to lack of funds or closure from the business enterprise.