TXT is a DNS record, which contains data in human-readable form for external sources to get information regarding a specific domain name or subdomain. In the most common situation, this kind of record is used to prove that you own a domain if you're trying to add it to an online search engine or to some traffic analytics platform. Considering that only the domain address owner/administrator may add custom DNS records, the TXT record functions as a proof of ownership for the firm supplying the service. Another popular use for this kind of records is the email SPF (Sender Policy Framework) protection, that makes sure that a particular email address shall not be spoofed and that individuals will not receive spam from allegedly your mailbox. The TXT record features info about the mail server where your online messages come from and functions as proof that it's a reliable one. Because there are no restrictions concerning the content of this sort of a record, you could add any other info as well.