TXT is a DNS record, which contains data in human-readable form for external sources to get information regarding 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 are trying to add it to an online search engine or to some traffic analytics platform. As only the domain address owner/administrator may add custom DNS records, the TXT record works as a proof of ownership for the business supplying the service. Another popular use for this kind of records is the e-mail SPF (Sender Policy Framework) protection, that makes sure that an e-mail address won't be spoofed and that others will not receive spam from allegedly your mailbox. The TXT record contains details about the mail server where your online messages come from and serves as verification that it's a dependable one. As there are no standards about the content of this type of a record, you could add any other info as well.