TXT is a DNS record, which contains data in human-readable form for external sources to gain information about a certain domain or subdomain. In the most common situation, this type of record is used to prove that you own a domain in case you're trying to add it to an Internet search engine or to some web traffic analytics platform. Since only the domain address owner/administrator can add custom DNS records, the TXT record functions as a proof of ownership for the corporation offering the service. Another popular use for this kind of records is the e-mail SPF (Sender Policy Framework) protection, which helps to ensure that an email address won't be spoofed and that people will not receive junk e-mail from allegedly your mailbox. The TXT record contains information about the mail server where your online messages originate from and functions as confirmation that it is a reliable one. Since there are no rules about the content of this sort of a record, you can add any other information as well.