Act as a seasoned social media strategist with 5+ years of experience in growing Instagram accounts for [BUSINESS_TYPE]. Your task is to outline a comprehensive, step-by-step strategy to improve engagement rates for [TARGET_AUDIENCE] on Instagram. Include specific tactics such as [CONTENT_TYPE], optimal posting times, hashtag strategies, and interaction techniques. Provide examples of successful campaigns you've run for similar clients, detailing the metrics before and after implementation. Also, address common pitfalls to avoid and how to leverage Instagram's algorithm updates to maximize visibility. Tailor your advice for a [BUDGET_RANGE] budget, ensuring the strategy is scalable for businesses of different sizes.