TXT is a DNS record, containing information in human-readable form for external sources to obtain info about a certain domain or subdomain. In the most common case, this sort of record is used to prove that you own a domain in case you are trying to add it to an Internet search engine or to some website traffic analytics platform. As just the Internet domain owner/administrator may add custom DNS records, the TXT record serves as a proof of ownership for the corporation providing the service. Another popular use for this sort of records is the e-mail SPF (Sender Policy Framework) protection, that ensures that an email address won't be spoofed and that individuals will not get junk e-mail from allegedly your mailbox. The TXT record features info about the mail server where your online messages originate from and serves as verification that it's a reliable one. As there are no standards about the content of this type of a record, you could also include any other info as well.