An SRV record is a DNS record, which is used to point a domain to a third-party server and use it for some service different from a website. This could be a Voice-Over-IP server, a video streaming service, an instant messaging system, and many others. When an SRV record is set up, you are able to specify an Internet Protocol which the domain will use and the port, that will be used to connect to the remote server. In addition, in case you have many SRV records for the same service, you are able to set different priorities and weights for each and every one of them, in order to distribute the load between a number of machines. Such a record allows you to employ the same domain name or subdomains under it with different companies, so you're able to use it for many purposes even if you are unable to get all services from one provider.