An SRV record, which is short for Service record, is a DNS entry which is used to identify the servers which run a specific service for a domain. In other words, you can use your domain not just for a web site, but also for an instant messaging server, a video streaming host or perhaps a Voice-Over-IP server, for example, while you still have a site with it. If you create the SRV record, you can choose what IP it's going to use, on which port the connection to the particular server will be established plus the priority and the weight of the record assuming that you have several SRV records for the very same service. The latter option will allow you to employ different machines for load balancing and redundancy. Using this type of DNS records, you can use the same domain address for a variety of purposes and even with different providers if the same one is unable to provide all services you need.