Some of the benefits of using SMS are:
Deliverability: Unlike an email, an SMS is much more likely to be read by a person at any one time as majority of the people have their mobile phones at arm's reach 24 hours a day. As 94% of all text messages are read, your marketing message will be seen by virtually all of the subscribers in your campaign.
Qualified Recipients: Since your subscribers have opted-in to receiving your offers and promotional messages, you know they have an active interest in your business and your products.
Flexibility: With text messages sent and received within minutes of starting your campaign, you can use mobile marketing for ad-hoc purposes, such as driving traffic to your store on slow nights.
Range of Use: Mobile marketing can be used for a wide range of purposes: announcing new product, one-day specials, new store openings, special events…etc. Subscribers can be treated as an exclusive group for offers and information that only they have access to, increasing loyalty, purchases, and speed of communications.
Instantly Recorded: Unlike a phone call, an SMS message is automatically stored where it can be re-read. This proves particularly useful in the case of fairly detailed information/reminder that might otherwise be forgotten.