No matter how good your password, there is always the possibility it will be stolen, or that you will be tricked into revealing it. To help in such instances, it is recommended to use 2-factor authentication wherever possible. This will involve an additional verification step to your login procedure. Normally to login you just have to enter your username and account. With 2FA you will have to provide a second verification of your identity. For example, you might be asked to enter a code sent to you by SMS, or that is generated by a second app to which you have access.