SMS campaigns are strategic marketing messages sent to targeted subscriber segments to achieve specific business objectives. Campaign types: - Promotional: Sales, discounts, offers - Product launch: New arrivals - Event: Flash sales, holidays - Engagement: Surveys, contests - Re-engagement: Win-back Campaign components: - Audience segment - Message content - Timing/schedule - CTA and link - Tracking parameters Campaign metrics: - Delivery rate - Click-through rate (CTR) - Conversion rate - Revenue attributed - Opt-out rate Best practices: - Segment your audience - Personalize messages - Clear, compelling CTA - Optimal timing - A/B test elements