PayPal’s 2-step verification (two-factor authentication) gives you an extra layer of security when accessing your account. This process can only be done through your web browser and not through the PayPal App. You can set up 2-step verification using an authenticator app (like Google authenticator and Microsoft authenticator.) 

Here's how to set up for 2- step verification for your mobile phone:

1. Click the Settings icon next to "Log out."
2. Click Security near the top of the page.
3. Click Set Up to the right of "2-step verification."
4. Choose how you’ll get your code by selecting "Use an authenticator app."
5. Click Set it Up and follow the steps on the screen.

This process can only be done through your web browser and not through the PayPal App.