TXT is a DNS record, containing data in human-readable form for external sources to get information regarding a certain domain or subdomain. In the most common situation, such a record is used to prove that you own a domain name if you're trying to add it to an online search engine or to some traffic analytics platform. Due to the fact that just the domain address owner/administrator can add custom DNS records, the TXT record serves as a verification of ownership for the business offering the service. Another popular use for this kind of records is the e-mail SPF (Sender Policy Framework) protection, that makes sure that an email address shall not be spoofed and that people will not receive unsolicited mail from allegedly your mailbox. The TXT record features information about the mail server where your digital messages come from and serves as verification that it is a trusted one. As there are no standards about the content of this type of a record, you could add any other info as well.