TXT is a DNS record, that contains info in human-readable form for external sources to gain information about a specific domain or subdomain. In the most common case, this type of record is used to prove that you own a domain name in case you're trying to add it to an Internet search engine or to some web traffic analytics platform. Considering that only the domain name owner/administrator is able to add custom DNS records, the TXT record serves as a verification of ownership for the company providing the service. Another popular use for this type of records is the e-mail SPF (Sender Policy Framework) protection, that ensures that a particular email address isn’t spoofed and that others will not receive spam from allegedly your mailbox. The TXT record features info about the mail server where your digital messages come from and serves as verification that it's a trusted one. Because there are no standards about the content of this type of a record, you could add any other info also.