Having 100 % control over your domains is something rather necessary and being able to access and edit the DNS records for every single one of them is among the things you need to look for when you search for a registration or a hosting provider. Perhaps you have heard of the so-called “name servers” that show where a domain is hosted, but below them there's a whole group of records, for example the A record, which is the IP address of the server hosting the site, and the MX records, which show the server that handles the e-mails for a specific domain address. These records are used if you wish to have your website with one provider and the emails with another, for example. You could also use a domain name for a non-website service or direct the traffic to it using special records. A lot of companies ask for an additional fee to grant access to edit certain DNS records apart from the name servers.