I just received a message from P411 that they will offer 2FA (two factor authentication)

It offers a second layer and if you use a third party 2fa and not your phone you can maintain a layer of abstraction... if you use your phone for example then not... if it's mandatory that you use it then it will be a problem.. if it's an option then it will offer security additions for thos who can and want to use it

I join AndrewD. in wishing to know more about how this works and what exactly are the benefits. Can anyone explain in Baby Boomer language?  

If someone get's your device and it automatically logs into P411, they can see what you've been doing. With 2FA it should stop them, unless your 2FA leads to the device they already have in their hand.