By default, WordPress is protected only by a password. Once somebody guesses your password, they have all access. Two Factor Authentication Nulled security is about adding a second factor. This plugin uses the most popular implementation of TFA: one-time codes that are shown on your phone/tablet/other device, but which do not require you to be connected to a network (i.e. you don’t need to be online/receiving SMSes, etc.).
GIPHY App Key not set. Please check settings