For added security on your account we recommend to activate two factor authentication.
On the top right corner click on "Security Settings"
You will be redirected to the security page, click on the button to start the procedure to enable the two factor authentication.
Click on the button to get started
Open Google Authenticator (if you don't have it you can download it from the app store or from Google play store for free) and scan the QR Code. Insert the generated code and click on submit to finish the procedure.