Why Telemarketing Is Best For Business Promotion And Sales? Before we consider how to collect phone numbers from websites for telemarketing or SMS marketing, let's understand fully what telemarketing actually is. Telemarketing is the use of phone numbers to call potential clients to promote your products or services while developing relationships with customers or businesses. It is a form of mobile marketing. No doubt, social media is a great way to approach customers. But these numbers of mobile users will surprise you. The total number of mobile users worldwide is 7.1 billion in 2021 and is projected to reach 7.49 billion by 2025, according to Google. It may surprise you, think about your own online behavior: When you sign up for a website, you have to enter your mobile number or email address to create the account. You even need a phone number to create a Facebook, LinkedIn, or Twitter account and to verify it. What’s more, Facebook and Twitter notify users by SMS for an...