This process is widely used for various purposes, including security, marketing, and customer data management. 

• Ensuring Authenticity: Number verification helps ensure that a telephone number provided by a user is genuine and active. This is crucial for businesses and services that rely on accurate customer contact information.

• Security and Fraud Prevention: In the context of security, number verification is often used as part of two-factor authentication (2FA) processes. It helps in verifying the identity of users and preventing unauthorized access to accounts.

• SMS and Voice Verification: Verification is commonly done through sending a code via SMS or a voice call to the provided number. The user then enters this code into the application or website to confirm that they have access to the phone number.

• Data Accuracy for Businesses: For businesses, verifying phone numbers can be important for maintaining accurate customer databases, ensuring that communications, such as marketing messages and alerts, reach the intended recipients.

Number verification is a vital tool in today's digital landscape, providing an additional layer of security for online transactions and communications, and ensuring the reliability of customer data for businesses.