A TXT record is text in free, human-readable form, that is associated with a domain as a DNS record for one purpose or another. The most common use of a TXT record is to add your website to an online search engine or to an analytics platform, which offers info about the web traffic to your web site. Setting up such a record works as confirmation that you are the domain owner and they'll supply the content you need to include as the value when you set up the record. Another purpose of a TXT record is to verify that an e-mail message is sent by the domain address owner and from a reliable hosting server - this is the so-called SPF protection, that helps prevent any electronic address set up under your domain name to be forged and unauthorized people to send unsolicited mail making it look like it was mailed from your own mailbox. You could add any other information you want to be associated with your domain name in a TXT record as well.