Act as a seasoned social media strategist with 5+ years of experience in the beauty industry. Develop a comprehensive Instagram engagement strategy tailored for [BRAND NAME], a [LUXURY/MAINSTREAM/INDIE] beauty brand targeting [DEMOGRAPHIC, e.g., Gen Z women aged 18-25]. The strategy should include: 1. Content pillars: Propose 3-5 thematic pillars (e.g., tutorials, product showcases, user-generated content) aligned with [BRAND'S CORE VALUES]. 2. Posting frequency: Recommend an optimal posting schedule (e.g., 4x/week) and best times for [TARGET AUDIENCE'S TIME ZONE]. 3. Engagement tactics: Suggest interactive features like polls, Q&As, or AR filters to boost [COMMENTS/SHARES/SAVES]. Include metrics to track (e.g., engagement rate, follower growth) and 2-3 competitor examples for inspiration. Focus on [VISUAL/AUTHENTIC/TREND-DRIVEN] content to stand out in [SPECIFIC NICHE, e.g., clean beauty].