TXT is a DNS record, that contains info in human-readable form for external sources to get information regarding a particular domain or subdomain. In the most common scenario, such a 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 website traffic analytics platform. Considering that just the domain address owner/administrator may add custom DNS records, the TXT record functions as a proof of ownership for the corporation providing the service. Another popular use for this sort of records is the email SPF (Sender Policy Framework) security, which makes sure that a particular email address isn’t spoofed and that others will not receive junk e-mail 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. Since there are no regulations concerning the content of this sort of a record, you could also include any other info as well.