TXT is a DNS record, which contains info in human-readable form for external sources to obtain information regarding a specific domain or subdomain. In the most common scenario, this kind of record is used to prove that you own a domain in case you are trying to add it to an online search engine or to some traffic analytics platform. As just the Internet domain owner/administrator is able to add custom DNS records, the TXT record functions as a verification of ownership for the business supplying the service. Another popular use for this sort of records is the e-mail SPF (Sender Policy Framework) security, that helps to ensure that an e-mail address shall not be spoofed and that people will not get junk e-mail from allegedly your mailbox. The TXT record contains information about the mail server where your online messages arrive from and functions as verification that it's a trusted one. As there are no regulations regarding the content of this type of a record, you can add any other information also.