Instructions to set up two-factor authentication on your online accounts.
Two-factor authentication (2FA) refers to an additional layer of security so that someone trying to access an online account has to prove they are who they say they are by providing two pieces of information—generally, a password, plus something else, such as a PIN.
Instructions how to turn on 2FA can usually be found in security settings under your profile or the settings tab. Alternatively you can use the search facility to find them. If 2FA is not supported consider contacting the developer and asking why not. 2FA is also referred to as multi-factor authentication (MFA) and two-step verification.
Instructions for some popular accounts are provided below: