From wired.com
WHETHER YOUR COMPUTER runs Windows, macOS, or Chrome OS, you have options for how you log in. And your choice doesn’t only affect how convenient it is for you to get into your laptop or desktop; it also affects how easily someone else can gain access.
These are the different login options that are available and that you need to be aware of, so make sure you choose wisely. The right one for you will depend on how your computer is set up and just how cautious you’d like to be.