Text message marketing is a type of digital marketing that involves sending promotions, specials, coupons, confirmations, news, updates, and other pertinent company information to your clients' mobile devices via SMS. Various rules apply to SMS marketing, such as the Telephone Consumer Protection Act and the Controlling the Assault of Non-Solicited Pornography and Marketing Act (CAN-SPAM Act), so you must be vigilant in developing a smart and legal SMS company marketing plan.