Each time you enter the platform, the IP address of where the connection is made is registered, by activating this security option, it can be accessed in a conventional way whenever the registered IP is, however, if you want to enter from a new IP, the system will send an email with the link to access, following it will take the dynamic password generator (Authy) to confirm the entry.
This reduces the possibility of fraud by limiting entry from an unusual address for the user.