TXT is a DNS record, that contains info in human-readable form for external sources to get information about a specific domain or subdomain. In the most common scenario, such a 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 traffic analytics platform. As only the domain address owner/administrator is able to add custom DNS records, the TXT record serves as a proof of ownership for the corporation offering the service. Another popular use for this sort of records is the email SPF (Sender Policy Framework) security, which helps to ensure that an e-mail address isn’t spoofed and that people will not receive spam from allegedly your mailbox. The TXT record includes info about the mail server where your electronic messages originate from and serves as proof that it is a reliable one. Since there are no standards regarding the content of this type of a record, you could add any other info as well.