An SRV record is a DNS record, that is used to direct a domain to a third-party server and use it for a service different from a web site. 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 could specify an Internet Protocol which the domain will use and the port, which will be used to connect to the remote server. Also, in case you have a few SRV records for the very same service, you could set individual priorities and weights for each and every one of them, allowing you to distribute the load between many machines. Such a record will allow you to employ the same domain or subdomains under it with different companies, so you could employ it for many purposes even if you can't get all services from a single service provider.