An SRV record, which signifies Service record, is a DNS entry employed to define the servers which run a particular service for a domain. Quite simply, you will be able to use your domain not only for a site, but also for an instant messaging server, a video streaming host or a Voice-Over-IP server, as an example, while you still have a site with it. If you create the SRV record, you may choose what Internet Protocol it'll use, on which port the connection to the specific server is going to be established plus the priority and the weight of the record provided that there are several SRV records for the exact same service. The latter option will allow you to employ different machines for load balancing and redundancy. Using this kind of DNS records, you can use the same domain name for a variety of purposes and even with different providers in case the same one can't provide all services that you need.