TXT is a DNS record, that contains information in human-readable form for external sources to obtain information about a certain domain or subdomain. In the most common situation, such a record is employed to prove that you own a domain if you're trying to add it to a search engine or to some traffic analytics platform. Since just the domain name owner/administrator can add custom DNS records, the TXT record serves as a proof of ownership for the business supplying the service. Another popular use for this kind of records is the e-mail SPF (Sender Policy Framework) protection, that ensures that an email address isn’t spoofed and that individuals will not receive junk e-mail from allegedly your mailbox. The TXT record contains information about the mail server where your digital messages come from and serves as confirmation that it's a dependable one. Since there are no standards about the content of such a record, you could add any other info as well.