Is SMS marketing expensive?
Actually, it depends on the number and size of your SMS campaign. However, according to past research, SMS marketing is considerably less expensive than other forms of marketing, such as email marketing, social media marketing, PPC advertising, and podcast advertising.
It's also a more responsive channel that allows you to quickly connect with your customers.
Do you know? - "It costs 5x more to acquire a new customer than it does to keep an existing, loyal customer, so win-back campaigns are vital to your brand’s SMS strategy” - Yotpo Study and Analysis
Text Marketing Best Practices:

Here's related information that you may also find helpful – SMS Marketing Statistics
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