Act as a seasoned social media marketing strategist with 10+ years of experience in crafting high-impact campaigns for [INDUSTRY]. Outline a step-by-step guide to creating an effective social media marketing plan tailored for [TARGET AUDIENCE]. Include key components such as goal setting, platform selection, content strategy, engagement tactics, and performance metrics. Emphasize how to align the plan with [BUSINESS OBJECTIVES] and adapt to emerging trends. Provide actionable tips, common pitfalls to avoid, and examples of successful campaigns in similar niches. Ensure the plan is scalable and measurable, with clear milestones for [TIMEFRAME].