An SRV record, which stands for Service record, is a DNS entry which is used to identify the servers that run a particular service for a domain name. Basically, you’re able to use your domain not only for a website, but also for an instant messaging server, a video streaming host or even a Voice-Over-IP server, for example, while you still have a site with it. If you create the SRV record, you can select what IP it'll use, on which port the connection to the specific server will be established along with the priority and the weight of the record in case that you have several SRV records for the very same service. The latter option will enable you to use different machines for load balancing and redundancy. With this kind of DNS records, you may use the same domain name many different purposes and even with different providers in case the same one is unable to provide all services that you need.