An SRV record, which signifies Service record, is a DNS entry that is used to identify the servers which run a specific service for a domain. Put simply, you will be able to use your domain not only for an Internet site, 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 website 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 specific server will be established plus the priority and the weight of the record in case 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. With this type of DNS records, you could use the same domain name for a variety of purposes and even with different companies if the same one is not able to provide all services that you need.