Easing this has been a long standing request for the web from many of the largest global developers. Finding an OTP within an SMS message, then copying and pasting it to the form is cumbersome, lowering conversion rates in critical user journeys. The current process creates friction for users. When a user is making a payment, asking for a one-time code sent via SMS can help verify the person's intent.
When signing in, a website asks for a one-time code sent via SMS on top of a password or other knowledge factor for extra security. When signing up for a new service, some websites ask for a phone number instead of an email address and use it as an account identifier. Phone number as an identifier for the user.This idea is already deployed in many scenarios to achieve: Sending this code back to the developer's server demonstrates control of the phone number. There are a variety of ways to verify phone numbers, but a randomly generated one-time password (OTP) sent by SMS is one of the most common. These days, most people in the world own a mobile device and developers are commonly using phone numbers as an identifier for users of their services.
If you want to learn more general SMS OTP form best practices including WebOTP API, checkout SMS OTP form best practices.
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