An SRV record, which stands for Service record, is a DNS entry employed to identify the servers which run a specific service for a domain. Put simply, you will be able to use your domain not just for a site, but also for an instant messaging server, a video streaming host or even a Voice-Over-IP server, for instance, while you still have a website with it. When you set up the SRV record, you may choose what IP it'll employ, on which port the connection to the specific server is going to be established as well as the priority and the weight of the record assuming that you have a number of SRV records for the very same service. The latter option will allow you to use different machines for load balancing and redundancy. With this type of DNS records, you may use the same domain for a number of purposes and even with different companies if the same one is not able to provide all services you need.