Domain Service Basics
If you're considering buying an expired domain, then hopefully you already know some of the intricacies of the process. In short, it's important to check the history of your domain and to make sure that the domain itself hasn't been used in any sort of unsavory web activity that might cause your domain to be blacklisted by search engines. You also need to check and see what kind of work the previous owner of the domain has put into making the domain popular and viable. While this doesn't sound that difficult, there is an inherent problem in the whole process. Thousands of domains become available every day for any variety of reasons- how do you sort through all of these domains to find a needle in a haystack? Even if you weren't already working to try and build a business, sorting through all of these domains would be worse than a full time job.
This is where a domain service comes into play. There are domain services out there that make it their specialty to sort through all of these expired and expiring domains to find the ones that are best for your purpose. So, one of the major purposes of these domain services is to act as a search engine for expiring domains and check them for the criteria you select. Depending on the service there will be different filters, but basically you have the option to search through the selections on different bases of merit, such as page rank or whether it appears in any domain listings. So basically one of the major functions of a domain service is to look through all of the possibilities and point out the ones that interest you. Some of these domain services allow you set up your parameters and email you new results that match your interests daily.
Some of the domain services stretch a little farther and make it a bit easier (and more organized) for you to back order a domain and basically help to walk you through the process of trying to acquire an expired domain. To be blunt, if you're trying to find an expired domain that has some credibility then it would almost be impossible to do so without the assistance of a domain service. Given the possible savings of investing in an expired domain, it doesn't seem like such a bad idea to take some of the money that will be saved in this fashion and use a bit of it for a domain service to streamline the acquisition process.