TXT is a DNS record, that contains information in human-readable form for external sources to get information about a particular domain name or subdomain. In the most common situation, this sort of record is used to prove that you own a domain in case you're trying to add it to a search engine or to some website traffic analytics platform. Considering that only the domain name owner/administrator can add custom DNS records, the TXT record works as a verification of ownership for the business supplying the service. Another popular use for this sort of records is the email SPF (Sender Policy Framework) protection, that helps to ensure that a particular email address won't be spoofed and that people will not receive junk e-mail from allegedly your mailbox. The TXT record includes details about the mail server where your digital messages come from and serves as validation that it's a reliable one. Because there are no restrictions regarding the content of such a record, you can add any other info as well.