The great thing about having an authentication solution that offers many different ways to authenticate is that you can pick and choose which ones you want to offer users. The following information will help you decide what will be most effective for your organization and your users. It helps to consider both the security requirements of the organization and the circumstances of the users. For example, sending an SMS one-time password (OTP) to a users phone less secure than a push notification using a mobile app.”]
Source: https://www.csoonline.com/article/3215230/article.html