An SRV record, which means Service record, is a DNS entry employed to identify the servers which run a certain service for a domain. Put simply, you’ll be able to use your domain not only for an Internet site, but also for an instant messaging server, a video streaming host or a Voice-Over-IP server, for example, while you still have an Internet site with it. When you create the SRV record, you may choose what Internet Protocol it'll employ, on which port the connection to the specific server will be established plus the priority and the weight of the record assuming that you have a number of SRV records for the exact same service. The latter option will allow you to use different machines for load balancing and redundancy. Using this type of DNS records, you could use the same domain name for various purposes and even with different providers in case the same one is not able to provide all services you need.