SMS marketing uses text messages to share updates, offers, or reminders directly to phones. Messages should be short and clear so the point is understood fast. Sending texts only to users who agreed is important to avoid problems. Timing matters because messages sent late can annoy people. Each message should have one clear purpose, like sharing a deal or alert. Simple words work better than sales talk. When used carefully, SMS feels direct and helpful. How often should businesses send texts without pushing people away?