An SRV record, which means Service record, is a DNS entry which is used to define the servers that run a certain service for a domain. Put simply, you can use your domain not just for an Internet site, but also for an instant messaging server, a video streaming host or perhaps a Voice-Over-IP server, for example, while you still have a website with it. When you set up the SRV record, you can pick what IP it will use, on which port the connection to the specific server will be established along with 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 allows you to use different machines for load balancing and redundancy. Using this type of DNS records, you could use the same domain address many different purposes and even with different companies if the same one is not able to provide all services you need.