Having 100 % control of your domains is something very necessary and to be able to access and edit the DNS records for every single one of them is one of the things you need to look for when you search for a registration or a shared hosting provider. You may have heard of the so-called “name servers” that show where a domain is hosted, but below them there's a whole list of records, like 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 emails for a certain domain name. These records are used if you would like have your website with one service provider and the e-mails with another, for example. You may also use a domain for a non-website service or direct the traffic to it by using special records. A lot of companies ask for an extra fee to provide access to edit certain DNS records besides the name servers.