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