Setting up a security token in Ffxiv is an important step to protect your account from unauthorized access. The first step is to log into the FFXIV official website and select 'Security Token' from the left-hand menu. Next, you will be prompted to enter a name for your token and then click 'Next'. You will then be presented with a code that needs to be entered into the app or device of your choice. To finish setting up the security token, you'll need to enter an additional verification code sent via email or text message. Once this process is complete, the security token will be activated and you can use it to authenticate future logins on your account.