TXT is a DNS record, which contains info in human-readable form for external sources to get information about a specific domain or subdomain. In the most common situation, this type of record is employed to prove that you own a domain name if you're trying to add it to an online search engine or to some web traffic analytics platform. Due to the fact that just the domain address owner/administrator is able to add custom DNS records, the TXT record works as a verification of ownership for the company providing the service. Another popular use for this sort of records is the e-mail SPF (Sender Policy Framework) security, that ensures that an e-mail address won't be spoofed and that others will not get unsolicited mail from allegedly your mailbox. The TXT record features information about the mail server where your online messages come from and functions as proof that it's a reliable one. As there are no standards concerning the content of this type of a record, you could add any other info also.