A TXT record is text in free, human-readable form, that's associated with a domain address as a DNS record for one purpose or another. The most popular use of a TXT record is to add your site to a search engine or to an analytics platform, that offers information about the targeted traffic to your web site. Setting up such a record works as proof that you're the Internet domain owner and they will provide the content that you need to include as the value when you set up the record. Another use of a TXT record is to validate that an email message is sent by the domain name owner and from a reliable web server - this is the so-called SPF protection, that prevents any electronic address set up under your domain name to be forged and unauthorized individuals to send junk e-mail making it appear like it was mailed from your own mailbox. You could include any other information you want to be associated with your domain address in a TXT record as well.