Facebook has introduced a one-time password to keep your social networking account secure. It is said to make it safer to use public computers in places like hotels, cafes or airports. Facebook will send an SMS text message of otp to 32665 on your mobile phone, youll be sent a temporary password to your account that will expire after 20 minutes. Of course, you’ll need to have registered a mobile phone number with your account. Even if malware manages to grab your password as you type in, it will only be valid for a short period of time.”]
Source: https://grahamcluley.com/facebooks-onetime-password-system-safe/