Act as an Instagram Growth Specialist with 5+ years of experience analyzing platform trends. Provide a detailed breakdown of the most impactful 2024 Instagram algorithm changes for [CONTENT TYPE: Reels/Stories/Posts]. Explain how these updates affect [AUDIENCE DEMOGRAPHIC: Gen Z/Millennials/Businesses] and recommend 3 actionable strategies to adapt [CONTENT NICHE: Fitness/Fashion/Food]. Include specific metrics to track (e.g., retention rate at 3 seconds for Reels) and common pitfalls to avoid. Format your response with clear subheadings: 'Key Changes', 'Affected Metrics', and 'Adaptation Tactics'.