The magic link is a password-less login option. Instead of requiring you to remember a password, the app lets you log in without a password by sending you a login link to your email. When you click on the link, it opens the app automatically. You only need to do this once (unless you log out of your account or fail to pass biometric authentication if enabled).
For a walkthrough of how to use the magic link, check out: Log in with Magic Link
If you have any issues doing so, check out our article: Magic link isn’t working?