Each and every domain that is registered and hosted has quite a lot of DNS records - some of them are set up automatically when you host a domain, others can be set up manually if necessary. As an example, the A record of a domain address is its IP address i.e. this record shows where the website is situated; the MX records reveal where the emails are handled, while with an SRV record you can use a domain name for unconventional purposes, including a Voice-over-IP service. Being able to create and modify specific records enables you to have different services with different providers if, for example, your present host provides dependable web hosting, but has difficulties with the email service, or you simply prefer to get a particular service from a particular company. Even though you will be able to create and edit these records freely and with no limits as you own a given domain, some companies charge extra to give you this option.