Companies are increasingly using common short codes (CSC) and SMS mobile marketing to reach wide audiences. CSCs allow customers to opt-in to receive promotional messages from brands on their mobile phones. Several case studies show that CSC campaigns generated significantly higher response rates than other channels. Metrics like sales, registrations, and engagements can be used to calculate return on investment for CSC campaigns. Integrating CSCs with other channels in a multichannel marketing plan can further increase campaign effectiveness and drive higher returns.